113431551 has 16 divisors (see below), whose sum is σ = 152686080. Its totient is φ = 74903360.

The previous prime is 113431523. The next prime is 113431579. The reversal of 113431551 is 155134311.

It is an interprime number because it is at equal distance from previous prime (113431523) and next prime (113431579).

It is not a de Polignac number, because 113431551 - 2⁵ = 113431519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113431951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201196 + ... + 201758.

It is an arithmetic number, because the mean of its divisors is an integer number (9542880).

Almost surely, 2^113431551 is an apocalyptic number.

113431551 is a deficient number, since it is larger than the sum of its proper divisors (39254529).

113431551 is a wasteful number, since it uses less digits than its factorization.

113431551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 900, while the sum is 24.

The square root of 113431551 is about 10650.4249211006. The cubic root of 113431551 is about 484.0734796688.

Adding to 113431551 its reverse (155134311), we get a palindrome (268565862).

The spelling of 113431551 in words is "one hundred thirteen million, four hundred thirty-one thousand, five hundred fifty-one".