113521651 has 4 divisors (see below), whose sum is σ = 115216072. Its totient is φ = 111827232.

The previous prime is 113521633. The next prime is 113521693. The reversal of 113521651 is 156125311.

It is a happy number.

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 113521651 - 2¹³ = 113513459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113521151) 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, 847110 + ... + 847243.

It is an arithmetic number, because the mean of its divisors is an integer number (28804018).

Almost surely, 2^113521651 is an apocalyptic number.

113521651 is a deficient number, since it is larger than the sum of its proper divisors (1694421).

113521651 is an equidigital number, since it uses as much as digits as its factorization.

113521651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694420.

The product of its digits is 900, while the sum is 25.

The square root of 113521651 is about 10654.6539596554. The cubic root of 113521651 is about 484.2016141465.

Adding to 113521651 its reverse (156125311), we get a palindrome (269646962).

The spelling of 113521651 in words is "one hundred thirteen million, five hundred twenty-one thousand, six hundred fifty-one".