113215031 has 4 divisors (see below), whose sum is σ = 114487200. Its totient is φ = 111942864.

The previous prime is 113215021. The next prime is 113215097. The reversal of 113215031 is 130512311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113215031 - 2¹⁰ = 113214007 is a prime.

It is a super-2 number, since 2×113215031² = 25635286488661922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113215021) 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, 635951 + ... + 636128.

It is an arithmetic number, because the mean of its divisors is an integer number (28621800).

Almost surely, 2^113215031 is an apocalyptic number.

113215031 is a deficient number, since it is larger than the sum of its proper divisors (1272169).

113215031 is an equidigital number, since it uses as much as digits as its factorization.

113215031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272168.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 113215031 is about 10640.2552131046. The cubic root of 113215031 is about 483.7652810286.

Adding to 113215031 its reverse (130512311), we get a palindrome (243727342).

The spelling of 113215031 in words is "one hundred thirteen million, two hundred fifteen thousand, thirty-one".