31102713 has 6 divisors (see below), whose sum is σ = 44926154. Its totient is φ = 20735136.

The previous prime is 31102697. The next prime is 31102727. The reversal of 31102713 is 31720113.

It can be written as a sum of positive squares in only one way, i.e., 29942784 + 1159929 = 5472^2 + 1077^2 .

It is not a de Polignac number, because 31102713 - 2⁴ = 31102697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31102783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1727920 + ... + 1727937.

Almost surely, 2^31102713 is an apocalyptic number.

It is an amenable number.

31102713 is a deficient number, since it is larger than the sum of its proper divisors (13823441).

31102713 is a wasteful number, since it uses less digits than its factorization.

31102713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3455863 (or 3455860 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 31102713 is about 5576.9806347162. The cubic root of 31102713 is about 314.4846296756.

Adding to 31102713 its reverse (31720113), we get a palindrome (62822826).

The spelling of 31102713 in words is "thirty-one million, one hundred two thousand, seven hundred thirteen".