40531405131 has 128 divisors (see below), whose sum is σ = 74977689600. Its totient is φ = 21123970560.

The previous prime is 40531405121. The next prime is 40531405157. The reversal of 40531405131 is 13150413504.

It is a happy number.

40531405131 is a `hidden beast` number, since 4 + 0 + 5 + 3 + 140 + 513 + 1 = 666.

It is not a de Polignac number, because 40531405131 - 2⁵ = 40531405099 is a prime.

It is a super-2 number, since 2×40531405131² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40531405095 and 40531405104.

It is not an unprimeable number, because it can be changed into a prime (40531405121) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10961475 + ... + 10965171.

It is an arithmetic number, because the mean of its divisors is an integer number (585763200).

Almost surely, 2^40531405131 is an apocalyptic number.

40531405131 is a deficient number, since it is larger than the sum of its proper divisors (34446284469).

40531405131 is a wasteful number, since it uses less digits than its factorization.

40531405131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846 (or 3840 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 40531405131 its reverse (13150413504), we get a palindrome (53681818635).

The spelling of 40531405131 in words is "forty billion, five hundred thirty-one million, four hundred five thousand, one hundred thirty-one".