399925345031 has 16 divisors (see below), whose sum is σ = 421889290560. Its totient is φ = 378518999040.

The previous prime is 399925345021. The next prime is 399925345037. The reversal of 399925345031 is 130543529993.

It is a cyclic number.

It is not a de Polignac number, because 399925345031 - 2³⁰ = 398851603207 is a prime.

It is a super-2 number, since 2×399925345031² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399925345037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1659326 + ... + 1884996.

It is an arithmetic number, because the mean of its divisors is an integer number (26368080660).

Almost surely, 2^399925345031 is an apocalyptic number.

399925345031 is a deficient number, since it is larger than the sum of its proper divisors (21963945529).

399925345031 is a wasteful number, since it uses less digits than its factorization.

399925345031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226906.

The product of its (nonzero) digits is 3936600, while the sum is 53.

The spelling of 399925345031 in words is "three hundred ninety-nine billion, nine hundred twenty-five million, three hundred forty-five thousand, thirty-one".