31103000213 has 4 divisors (see below), whose sum is σ = 31105139520. Its totient is φ = 31100860908.

The previous prime is 31103000191. The next prime is 31103000219. The reversal of 31103000213 is 31200030113.

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 31103000213 - 2²⁶ = 31035891349 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 (31103000219) 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, 1047695 + ... + 1076972.

It is an arithmetic number, because the mean of its divisors is an integer number (7776284880).

Almost surely, 2^31103000213 is an apocalyptic number.

It is an amenable number.

31103000213 is a deficient number, since it is larger than the sum of its proper divisors (2139307).

31103000213 is a wasteful number, since it uses less digits than its factorization.

31103000213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139306.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31103000213 its reverse (31200030113), we get a palindrome (62303030326).

The spelling of 31103000213 in words is "thirty-one billion, one hundred three million, two hundred thirteen", and thus it is an aban number.