400251131125 has 16 divisors (see below), whose sum is σ = 506548823040. Its totient is φ = 315691026000.

The previous prime is 400251131117. The next prime is 400251131153. The reversal of 400251131125 is 521131152004.

It is not a de Polignac number, because 400251131125 - 2³ = 400251131117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 400251131125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22540485 + ... + 22558234.

It is an arithmetic number, because the mean of its divisors is an integer number (31659301440).

Almost surely, 2^400251131125 is an apocalyptic number.

It is an amenable number.

400251131125 is a deficient number, since it is larger than the sum of its proper divisors (106297691915).

400251131125 is an equidigital number, since it uses as much as digits as its factorization.

400251131125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45098805 (or 45098795 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 400251131125 its reverse (521131152004), we get a palindrome (921382283129).

The spelling of 400251131125 in words is "four hundred billion, two hundred fifty-one million, one hundred thirty-one thousand, one hundred twenty-five".