113901521 has 2 divisors, whose sum is σ = 113901522. Its totient is φ = 113901520.

The previous prime is 113901517. The next prime is 113901553. The reversal of 113901521 is 125109311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113720896 + 180625 = 10664^2 + 425^2 .

It is a cyclic number.

It is not a de Polignac number, because 113901521 - 2² = 113901517 is a prime.

It is a super-2 number, since 2×113901521² = 25947112972226882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113901511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56950760 + 56950761.

It is an arithmetic number, because the mean of its divisors is an integer number (56950761).

Almost surely, 2^113901521 is an apocalyptic number.

It is an amenable number.

113901521 is a deficient number, since it is larger than the sum of its proper divisors (1).

113901521 is an equidigital number, since it uses as much as digits as its factorization.

113901521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 113901521 is about 10672.4655539383. The cubic root of 113901521 is about 484.7410968044.

The spelling of 113901521 in words is "one hundred thirteen million, nine hundred one thousand, five hundred twenty-one".