46331581 has 4 divisors (see below), whose sum is σ = 46378332. Its totient is φ = 46284832.

The previous prime is 46331569. The next prime is 46331617. The reversal of 46331581 is 18513364.

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 3363556 + 42968025 = 1834^2 + 6555^2 .

It is a cyclic number.

It is not a de Polignac number, because 46331581 - 2²¹ = 44234429 is a prime.

It is a super-2 number, since 2×46331581² = 4293230795919122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46331501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21856 + ... + 23881.

It is an arithmetic number, because the mean of its divisors is an integer number (11594583).

Almost surely, 2^46331581 is an apocalyptic number.

It is an amenable number.

46331581 is a deficient number, since it is larger than the sum of its proper divisors (46751).

46331581 is a wasteful number, since it uses less digits than its factorization.

46331581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46750.

The product of its digits is 8640, while the sum is 31.

The square root of 46331581 is about 6806.7305661382. The cubic root of 46331581 is about 359.1636474811.

The spelling of 46331581 in words is "forty-six million, three hundred thirty-one thousand, five hundred eighty-one".