400025131 has 16 divisors (see below), whose sum is σ = 465067008. Its totient is φ = 340436800.

The previous prime is 400025099. The next prime is 400025149. The reversal of 400025131 is 131520004.

It is not a de Polignac number, because 400025131 - 2⁵ = 400025099 is a prime.

It is a super-2 number, since 2×400025131² = 320040210863134322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400025191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4930 + ... + 28711.

It is an arithmetic number, because the mean of its divisors is an integer number (29066688).

Almost surely, 2^400025131 is an apocalyptic number.

400025131 is a deficient number, since it is larger than the sum of its proper divisors (65041877).

400025131 is a wasteful number, since it uses less digits than its factorization.

400025131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33722.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 400025131 is about 20000.6282651321. The cubic root of 400025131 is about 736.8217299709.

Adding to 400025131 its reverse (131520004), we get a palindrome (531545135).

The spelling of 400025131 in words is "four hundred million, twenty-five thousand, one hundred thirty-one".