400544131 has 8 divisors (see below), whose sum is σ = 433740944. Its totient is φ = 367688160.

The previous prime is 400544107. The next prime is 400544147. The reversal of 400544131 is 131445004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400544131 - 2¹³ = 400535939 is a prime.

It is a super-2 number, since 2×400544131² = 320871201757090322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400544231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82761 + ... + 87466.

It is an arithmetic number, because the mean of its divisors is an integer number (54217618).

Almost surely, 2^400544131 is an apocalyptic number.

400544131 is a deficient number, since it is larger than the sum of its proper divisors (33196813).

400544131 is a wasteful number, since it uses less digits than its factorization.

400544131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170421.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 400544131 is about 20013.5986519167. The cubic root of 400544131 is about 737.1402476382.

Adding to 400544131 its reverse (131445004), we get a palindrome (531989135).

The spelling of 400544131 in words is "four hundred million, five hundred forty-four thousand, one hundred thirty-one".