400512542131 has 6 divisors (see below), whose sum is σ = 433691096100. Its totient is φ = 369703884888.

The previous prime is 400512542093. The next prime is 400512542173. The reversal of 400512542131 is 131245215004.

It is not a de Polignac number, because 400512542131 - 2²¹ = 400510444979 is a prime.

It is a super-2 number, since 2×400512542131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400512542131.

It is not an unprimeable number, because it can be changed into a prime (400512546131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184948181 + ... + 1184948518.

It is an arithmetic number, because the mean of its divisors is an integer number (72281849350).

Almost surely, 2^400512542131 is an apocalyptic number.

400512542131 is a deficient number, since it is larger than the sum of its proper divisors (33178553969).

400512542131 is a wasteful number, since it uses less digits than its factorization.

400512542131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369896725 (or 2369896712 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 400512542131 its reverse (131245215004), we get a palindrome (531757757135).

The spelling of 400512542131 in words is "four hundred billion, five hundred twelve million, five hundred forty-two thousand, one hundred thirty-one".