131443635401172 has 48 divisors (see below), whose sum is σ = 340788341308800. Its totient is φ = 43813446384960.

The previous prime is 131443635401149. The next prime is 131443635401173. The reversal of 131443635401172 is 271104536344131.

It is a happy number.

131443635401172 is a `hidden beast` number, since 1 + 3 + 1 + 4 + 4 + 3 + 635 + 4 + 0 + 1 + 1 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131443635401173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10928104 + ... + 19552767.

It is an arithmetic number, because the mean of its divisors is an integer number (7099757110600).

Almost surely, 2^{131443635401172} is an apocalyptic number.

131443635401172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131443635401172 is an abundant number, since it is smaller than the sum of its proper divisors (209344705907628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131443635401172 is a wasteful number, since it uses less digits than its factorization.

131443635401172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30520813 (or 30520805 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 131443635401172 in words is "one hundred thirty-one trillion, four hundred forty-three billion, six hundred thirty-five million, four hundred one thousand, one hundred seventy-two".