113021537 has 4 divisors (see below), whose sum is σ = 113770176. Its totient is φ = 112272900.

The previous prime is 113021509. The next prime is 113021549. The reversal of 113021537 is 735120311.

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: 735120311 = 449 ⋅1637239.

It is a cyclic number.

It is not a de Polignac number, because 113021537 - 2¹² = 113017441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113021507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374093 + ... + 374394.

It is an arithmetic number, because the mean of its divisors is an integer number (28442544).

Almost surely, 2^113021537 is an apocalyptic number.

It is an amenable number.

113021537 is a deficient number, since it is larger than the sum of its proper divisors (748639).

113021537 is an equidigital number, since it uses as much as digits as its factorization.

113021537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748638.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 113021537 is about 10631.1587797380. The cubic root of 113021537 is about 483.4895253690.

Adding to 113021537 its reverse (735120311), we get a palindrome (848141848).

The spelling of 113021537 in words is "one hundred thirteen million, twenty-one thousand, five hundred thirty-seven".