400555105031 has 4 divisors (see below), whose sum is σ = 400557403752. Its totient is φ = 400552806312.

The previous prime is 400555104997. The next prime is 400555105057. The reversal of 400555105031 is 130501555004.

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

It is a cyclic number.

It is not a de Polignac number, because 400555105031 - 2³⁰ = 399481363207 is a prime.

It is a super-2 number, since 2×400555105031² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400555104985 and 400555105003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400555105061) 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, 864440 + ... + 1244333.

It is an arithmetic number, because the mean of its divisors is an integer number (100139350938).

Almost surely, 2^400555105031 is an apocalyptic number.

400555105031 is a deficient number, since it is larger than the sum of its proper divisors (2298721).

400555105031 is a wasteful number, since it uses less digits than its factorization.

400555105031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298720.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 400555105031 in words is "four hundred billion, five hundred fifty-five million, one hundred five thousand, thirty-one".