31203200113 has 4 divisors (see below), whose sum is σ = 31206026608. Its totient is φ = 31200373620.

The previous prime is 31203200099. The next prime is 31203200117. The reversal of 31203200113 is 31100230213.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31100230213 = 13 ⋅2392325401.

It is a cyclic number.

It is not a de Polignac number, because 31203200113 - 2²⁵ = 31169645681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31203200117) 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, 1396623 + ... + 1418788.

It is an arithmetic number, because the mean of its divisors is an integer number (7801506652).

Almost surely, 2^31203200113 is an apocalyptic number.

It is an amenable number.

31203200113 is a deficient number, since it is larger than the sum of its proper divisors (2826495).

31203200113 is a wasteful number, since it uses less digits than its factorization.

31203200113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2826494.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31203200113 its reverse (31100230213), we get a palindrome (62303430326).

The spelling of 31203200113 in words is "thirty-one billion, two hundred three million, two hundred thousand, one hundred thirteen".