31331200113 has 16 divisors (see below), whose sum is σ = 47404181760. Its totient is φ = 20443051728.

The previous prime is 31331200097. The next prime is 31331200157. The reversal of 31331200113 is 31100213313.

It is a happy number.

It is not a de Polignac number, because 31331200113 - 2⁴ = 31331200097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31331200193) 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, 12343570 + ... + 12346107.

It is an arithmetic number, because the mean of its divisors is an integer number (2962761360).

Almost surely, 2^31331200113 is an apocalyptic number.

It is an amenable number.

31331200113 is a deficient number, since it is larger than the sum of its proper divisors (16072981647).

31331200113 is a wasteful number, since it uses less digits than its factorization.

31331200113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24689733 (or 24689727 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31331200113 its reverse (31100213313), we get a palindrome (62431413426).

The spelling of 31331200113 in words is "thirty-one billion, three hundred thirty-one million, two hundred thousand, one hundred thirteen".