113533551 has 24 divisors (see below), whose sum is σ = 168700896. Its totient is φ = 73532160.

The previous prime is 113533549. The next prime is 113533561. The reversal of 113533551 is 155335311.

It is not a de Polignac number, because 113533551 - 2¹ = 113533549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113533561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115006 + ... + 115988.

It is an arithmetic number, because the mean of its divisors is an integer number (7029204).

Almost surely, 2^113533551 is an apocalyptic number.

113533551 is a deficient number, since it is larger than the sum of its proper divisors (55167345).

113533551 is a wasteful number, since it uses less digits than its factorization.

113533551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343 (or 1340 counting only the distinct ones).

The product of its digits is 3375, while the sum is 27.

The square root of 113533551 is about 10655.2123864332. The cubic root of 113533551 is about 484.2185324989.

Adding to 113533551 its reverse (155335311), we get a palindrome (268868862).

The spelling of 113533551 in words is "one hundred thirteen million, five hundred thirty-three thousand, five hundred fifty-one".