115651557 has 20 divisors (see below), whose sum is σ = 197444896. Its totient is φ = 66086280.

The previous prime is 115651541. The next prime is 115651589. The reversal of 115651557 is 755156511.

It is a happy number.

115651557 is a `hidden beast` number, since 1 + 1 + 56 + 51 + 557 = 666.

It is not a de Polignac number, because 115651557 - 2⁴ = 115651541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115651517) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 101419 + ... + 102552.

Almost surely, 2^115651557 is an apocalyptic number.

It is an amenable number.

115651557 is a deficient number, since it is larger than the sum of its proper divisors (81793339).

115651557 is an equidigital number, since it uses as much as digits as its factorization.

115651557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203990 (or 203981 counting only the distinct ones).

The product of its digits is 26250, while the sum is 36.

The square root of 115651557 is about 10754.1413883211. The cubic root of 115651557 is about 487.2110856149.

The spelling of 115651557 in words is "one hundred fifteen million, six hundred fifty-one thousand, five hundred fifty-seven".