31033122013 has 4 divisors (see below), whose sum is σ = 31034184480. Its totient is φ = 31032059548.

The previous prime is 31033122011. The next prime is 31033122017. The reversal of 31033122013 is 31022133013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31033122013 - 2¹ = 31033122011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31033122011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486145 + ... + 546262.

It is an arithmetic number, because the mean of its divisors is an integer number (7758546120).

Almost surely, 2^31033122013 is an apocalyptic number.

It is an amenable number.

31033122013 is a deficient number, since it is larger than the sum of its proper divisors (1062467).

31033122013 is a wasteful number, since it uses less digits than its factorization.

31033122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062466.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31033122013 its reverse (31022133013), we get a palindrome (62055255026).

The spelling of 31033122013 in words is "thirty-one billion, thirty-three million, one hundred twenty-two thousand, thirteen".