31020113 has 8 divisors (see below), whose sum is σ = 31570560. Its totient is φ = 30472960.

The previous prime is 31020107. The next prime is 31020127. The reversal of 31020113 is 31102013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31020113 - 2¹² = 31016017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31020094 and 31020103.

It is not an unprimeable number, because it can be changed into a prime (31020133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24881 + ... + 26097.

It is an arithmetic number, because the mean of its divisors is an integer number (3946320).

Almost surely, 2^31020113 is an apocalyptic number.

It is an amenable number.

31020113 is a deficient number, since it is larger than the sum of its proper divisors (550447).

31020113 is a wasteful number, since it uses less digits than its factorization.

31020113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 31020113 is about 5569.5702706762. The cubic root of 31020113 is about 314.2059888193.

Adding to 31020113 its reverse (31102013), we get a palindrome (62122126).

The spelling of 31020113 in words is "thirty-one million, twenty thousand, one hundred thirteen".