115157621 has 2 divisors, whose sum is σ = 115157622. Its totient is φ = 115157620.

The previous prime is 115157611. The next prime is 115157639. The reversal of 115157621 is 126751511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 19704721 = 9770^2 + 4439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115157621 is a prime.

It is a super-2 number, since 2×115157621² = 26522555348759282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115157611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57578810 + 57578811.

It is an arithmetic number, because the mean of its divisors is an integer number (57578811).

Almost surely, 2^115157621 is an apocalyptic number.

It is an amenable number.

115157621 is a deficient number, since it is larger than the sum of its proper divisors (1).

115157621 is an equidigital number, since it uses as much as digits as its factorization.

115157621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 29.

The square root of 115157621 is about 10731.1518953000. The cubic root of 115157621 is about 486.5164862079.

The spelling of 115157621 in words is "one hundred fifteen million, one hundred fifty-seven thousand, six hundred twenty-one".