31611123313 has 48 divisors (see below), whose sum is σ = 40216901760. Its totient is φ = 24319215360.

The previous prime is 31611123307. The next prime is 31611123347. The reversal of 31611123313 is 31332111613.

It is a de Polignac number, because none of the positive numbers 2^k-31611123313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31611123913) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51567595 + ... + 51568207.

It is an arithmetic number, because the mean of its divisors is an integer number (837852120).

Almost surely, 2^31611123313 is an apocalyptic number.

It is an amenable number.

31611123313 is a deficient number, since it is larger than the sum of its proper divisors (8605778447).

31611123313 is a wasteful number, since it uses less digits than its factorization.

31611123313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318 (or 1307 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

Adding to 31611123313 its reverse (31332111613), we get a palindrome (62943234926).

The spelling of 31611123313 in words is "thirty-one billion, six hundred eleven million, one hundred twenty-three thousand, three hundred thirteen".