581981401 has 8 divisors (see below), whose sum is σ = 596744064. Its totient is φ = 567318000.

The previous prime is 581981377. The next prime is 581981503. The reversal of 581981401 is 104189185.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 581981401 - 2⁷ = 581981273 is a prime.

It is a super-2 number, since 2×581981401² = 677404702219845602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581981201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12870 + ... + 36463.

It is an arithmetic number, because the mean of its divisors is an integer number (74593008).

Almost surely, 2^581981401 is an apocalyptic number.

It is an amenable number.

581981401 is a deficient number, since it is larger than the sum of its proper divisors (14762663).

581981401 is a wasteful number, since it uses less digits than its factorization.

581981401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49631.

The product of its (nonzero) digits is 11520, while the sum is 37.

The square root of 581981401 is about 24124.2906838730. The cubic root of 581981401 is about 834.9036670393.

The spelling of 581981401 in words is "five hundred eighty-one million, nine hundred eighty-one thousand, four hundred one".