113551521 has 4 divisors (see below), whose sum is σ = 151402032. Its totient is φ = 75701012.

The previous prime is 113551499. The next prime is 113551523. The reversal of 113551521 is 125155311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113551521 - 2⁵ = 113551489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113551491 and 113551500.

It is not an unprimeable number, because it can be changed into a prime (113551523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18925251 + ... + 18925256.

It is an arithmetic number, because the mean of its divisors is an integer number (37850508).

Almost surely, 2^113551521 is an apocalyptic number.

It is an amenable number.

113551521 is a deficient number, since it is larger than the sum of its proper divisors (37850511).

113551521 is an equidigital number, since it uses as much as digits as its factorization.

113551521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37850510.

The product of its digits is 750, while the sum is 24.

The square root of 113551521 is about 10656.0556023324. The cubic root of 113551521 is about 484.2440783923.

The spelling of 113551521 in words is "one hundred thirteen million, five hundred fifty-one thousand, five hundred twenty-one".