113212513 has 4 divisors (see below), whose sum is σ = 114902320. Its totient is φ = 111522708.

The previous prime is 113212511. The next prime is 113212531. The reversal of 113212513 is 315212311.

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 113212513 - 2¹ = 113212511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113212511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844803 + ... + 844936.

It is an arithmetic number, because the mean of its divisors is an integer number (28725580).

Almost surely, 2^113212513 is an apocalyptic number.

It is an amenable number.

113212513 is a deficient number, since it is larger than the sum of its proper divisors (1689807).

113212513 is an equidigital number, since it uses as much as digits as its factorization.

113212513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689806.

The product of its digits is 180, while the sum is 19.

The square root of 113212513 is about 10640.1368882172. The cubic root of 113212513 is about 483.7616945495.

Adding to 113212513 its reverse (315212311), we get a palindrome (428424824).

The spelling of 113212513 in words is "one hundred thirteen million, two hundred twelve thousand, five hundred thirteen".