400725550931 has 4 divisors (see below), whose sum is σ = 401562139200. Its totient is φ = 399888962664.

The previous prime is 400725550891. The next prime is 400725550997. The reversal of 400725550931 is 139055527004.

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 400725550931 - 2⁶ = 400725550867 is a prime.

It is a super-2 number, since 2×400725550931² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400725550331) 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, 418293416 + ... + 418294373.

It is an arithmetic number, because the mean of its divisors is an integer number (100390534800).

Almost surely, 2^400725550931 is an apocalyptic number.

400725550931 is a deficient number, since it is larger than the sum of its proper divisors (836588269).

400725550931 is an equidigital number, since it uses as much as digits as its factorization.

400725550931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836588268.

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 400725550931 in words is "four hundred billion, seven hundred twenty-five million, five hundred fifty thousand, nine hundred thirty-one".