5731403581 has 4 divisors (see below), whose sum is σ = 5731571164. Its totient is φ = 5731236000.

The previous prime is 5731403549. The next prime is 5731403591. The reversal of 5731403581 is 1853041375.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5418432100 + 312971481 = 73610^2 + 17691^2 .

It is a 3-Lehmer number, since φ(5731403581) divides (5731403581-1)³.

It is a cyclic number.

It is not a de Polignac number, because 5731403581 - 2⁵ = 5731403549 is a prime.

It is a super-2 number, since 2×5731403581² = 65697974016599247122, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 5731403581 parts by 107064 straight cuts.

It is a deceptive number, since it divides R_5731403580.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5731403581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5731403591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11970 + ... + 107731.

It is an arithmetic number, because the mean of its divisors is an integer number (1432892791).

Almost surely, 2^5731403581 is an apocalyptic number.

5731403581 is the 47881-st heptagonal number.

It is an amenable number.

5731403581 is a deficient number, since it is larger than the sum of its proper divisors (167583).

5731403581 is a wasteful number, since it uses less digits than its factorization.

5731403581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167582.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 5731403581 is about 75706.0339801260. The cubic root of 5731403581 is about 1789.5904914052.

The spelling of 5731403581 in words is "five billion, seven hundred thirty-one million, four hundred three thousand, five hundred eighty-one".