31113020133 has 32 divisors (see below), whose sum is σ = 49661539200. Its totient is φ = 19137783168.

The previous prime is 31113020119. The next prime is 31113020137. The reversal of 31113020133 is 33102031113.

It is a happy number.

It is not a de Polignac number, because 31113020133 - 2⁴ = 31113020117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113020137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 802041 + ... + 839937.

It is an arithmetic number, because the mean of its divisors is an integer number (1551923100).

Almost surely, 2^31113020133 is an apocalyptic number.

It is an amenable number.

31113020133 is a deficient number, since it is larger than the sum of its proper divisors (18548519067).

31113020133 is a wasteful number, since it uses less digits than its factorization.

31113020133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40258 (or 40252 counting only the distinct ones).

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

Adding to 31113020133 its reverse (33102031113), we get a palindrome (64215051246).

The spelling of 31113020133 in words is "thirty-one billion, one hundred thirteen million, twenty thousand, one hundred thirty-three".