113115551 has 4 divisors (see below), whose sum is σ = 113149992. Its totient is φ = 113081112.

The previous prime is 113115539. The next prime is 113115571. The reversal of 113115551 is 155511311.

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 113115551 - 2¹⁰ = 113114527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113115521) 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, 11705 + ... + 19058.

It is an arithmetic number, because the mean of its divisors is an integer number (28287498).

Almost surely, 2^113115551 is an apocalyptic number.

113115551 is a deficient number, since it is larger than the sum of its proper divisors (34441).

113115551 is an equidigital number, since it uses as much as digits as its factorization.

113115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34440.

The product of its digits is 375, while the sum is 23.

The square root of 113115551 is about 10635.5794858578. The cubic root of 113115551 is about 483.6235475734.

Adding to 113115551 its reverse (155511311), we get a palindrome (268626862).

The spelling of 113115551 in words is "one hundred thirteen million, one hundred fifteen thousand, five hundred fifty-one".