64031881 has 8 divisors (see below), whose sum is σ = 67485600. Its totient is φ = 60586560.

The previous prime is 64031819. The next prime is 64031893. The reversal of 64031881 is 18813046.

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 64031881 - 2⁷ = 64031753 is a prime.

It is a super-2 number, since 2×64031881² = 8200163568796322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64031081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19185 + ... + 22273.

It is an arithmetic number, because the mean of its divisors is an integer number (8435700).

Almost surely, 2^64031881 is an apocalyptic number.

It is an amenable number.

64031881 is a deficient number, since it is larger than the sum of its proper divisors (3453719).

64031881 is a wasteful number, since it uses less digits than its factorization.

64031881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4199.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 64031881 is about 8001.9923144177. The cubic root of 64031881 is about 400.0664077244.

The spelling of 64031881 in words is "sixty-four million, thirty-one thousand, eight hundred eighty-one".