400231004025 has 48 divisors (see below), whose sum is σ = 678516058304. Its totient is φ = 208102625280.

The previous prime is 400231004021. The next prime is 400231004027. The reversal of 400231004025 is 520400132004.

It is not a de Polignac number, because 400231004025 - 2² = 400231004021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400231003992 and 400231004010.

It is not an unprimeable number, because it can be changed into a prime (400231004021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76869 + ... + 897981.

Almost surely, 2^400231004025 is an apocalyptic number.

It is an amenable number.

400231004025 is a deficient number, since it is larger than the sum of its proper divisors (278285054279).

400231004025 is a wasteful number, since it uses less digits than its factorization.

400231004025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821290 (or 821285 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

Adding to 400231004025 its reverse (520400132004), we get a palindrome (920631136029).

The spelling of 400231004025 in words is "four hundred billion, two hundred thirty-one million, four thousand, twenty-five".