113218551 has 12 divisors (see below), whose sum is σ = 163901712. Its totient is φ = 75311136.

The previous prime is 113218537. The next prime is 113218561. The reversal of 113218551 is 155812311.

It is not a de Polignac number, because 113218551 - 2¹⁷ = 113087479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113218531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9651 + ... + 17876.

It is an arithmetic number, because the mean of its divisors is an integer number (13658476).

Almost surely, 2^113218551 is an apocalyptic number.

113218551 is a deficient number, since it is larger than the sum of its proper divisors (50683161).

113218551 is a wasteful number, since it uses less digits than its factorization.

113218551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27990 (or 27987 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 113218551 is about 10640.4206213852. The cubic root of 113218551 is about 483.7702946036.

It can be divided in two parts, 1132 and 18551, that added together give a 9-th power (19683 = 3⁹).

The spelling of 113218551 in words is "one hundred thirteen million, two hundred eighteen thousand, five hundred fifty-one".