31103033213 has 32 divisors (see below), whose sum is σ = 37850883840. Its totient is φ = 24949555200.

The previous prime is 31103033209. The next prime is 31103033263. The reversal of 31103033213 is 31233030113.

It is a cyclic number.

It is not a de Polignac number, because 31103033213 - 2² = 31103033209 is a prime.

It is a super-2 number, since 2×31103033213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103033263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25897013 + ... + 25898213.

It is an arithmetic number, because the mean of its divisors is an integer number (1182840120).

Almost surely, 2^31103033213 is an apocalyptic number.

It is an amenable number.

31103033213 is a deficient number, since it is larger than the sum of its proper divisors (6747850627).

31103033213 is a wasteful number, since it uses less digits than its factorization.

31103033213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31103033213 its reverse (31233030113), we get a palindrome (62336063326).

The spelling of 31103033213 in words is "thirty-one billion, one hundred three million, thirty-three thousand, two hundred thirteen".