113405551 has 12 divisors (see below), whose sum is σ = 132128280. Its totient is φ = 97051920.

The previous prime is 113405503. The next prime is 113405561. The reversal of 113405551 is 155504311.

It is a happy number.

It is not a de Polignac number, because 113405551 - 2⁷ = 113405423 is a prime.

It is a super-2 number, since 2×113405551² = 25721637995227202, 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 (113405561) 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, 38820 + ... + 41638.

It is an arithmetic number, because the mean of its divisors is an integer number (11010690).

Almost surely, 2^113405551 is an apocalyptic number.

113405551 is a deficient number, since it is larger than the sum of its proper divisors (18722729).

113405551 is an equidigital number, since it uses as much as digits as its factorization.

113405551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654 (or 3647 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 113405551 is about 10649.2042425714. The cubic root of 113405551 is about 484.0364915113.

Adding to 113405551 its reverse (155504311), we get a palindrome (268909862).

The spelling of 113405551 in words is "one hundred thirteen million, four hundred five thousand, five hundred fifty-one".