31031400132 has 48 divisors (see below), whose sum is σ = 82163531520. Its totient is φ = 10123717536.

The previous prime is 31031400121. The next prime is 31031400139. The reversal of 31031400132 is 23100413013.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31031400139) 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, 3051603 + ... + 3061754.

It is an arithmetic number, because the mean of its divisors is an integer number (1711740240).

Almost surely, 2^31031400132 is an apocalyptic number.

It is an amenable number.

31031400132 is an abundant number, since it is smaller than the sum of its proper divisors (51132131388).

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

31031400132 is a wasteful number, since it uses less digits than its factorization.

31031400132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6113417 (or 6113409 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31031400132 its reverse (23100413013), we get a palindrome (54131813145).

The spelling of 31031400132 in words is "thirty-one billion, thirty-one million, four hundred thousand, one hundred thirty-two".