31102113 has 24 divisors (see below), whose sum is σ = 48558528. Its totient is φ = 17655456.

The previous prime is 31102087. The next prime is 31102121. The reversal of 31102113 is 31120113.

It is not a de Polignac number, because 31102113 - 2¹³ = 31093921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31102133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24820 + ... + 26042.

It is an arithmetic number, because the mean of its divisors is an integer number (2023272).

Almost surely, 2^31102113 is an apocalyptic number.

It is an amenable number.

31102113 is a deficient number, since it is larger than the sum of its proper divisors (17456415).

31102113 is a wasteful number, since it uses less digits than its factorization.

31102113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 31102113 is about 5576.9268419085. The cubic root of 31102113 is about 314.4826074298.

Adding to 31102113 its reverse (31120113), we get a palindrome (62222226).

The spelling of 31102113 in words is "thirty-one million, one hundred two thousand, one hundred thirteen".