115663531 has 2 divisors, whose sum is σ = 115663532. Its totient is φ = 115663530.

The previous prime is 115663489. The next prime is 115663547. The reversal of 115663531 is 135366511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115663531 - 2⁷ = 115663403 is a prime.

It is a super-2 number, since 2×115663531² = 26756104806775922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115663493 and 115663502.

It is not a weakly prime, because it can be changed into another prime (115666531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57831765 + 57831766.

It is an arithmetic number, because the mean of its divisors is an integer number (57831766).

Almost surely, 2^115663531 is an apocalyptic number.

115663531 is a deficient number, since it is larger than the sum of its proper divisors (1).

115663531 is an equidigital number, since it uses as much as digits as its factorization.

115663531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 115663531 is about 10754.6980896723. The cubic root of 115663531 is about 487.2278995238.

The spelling of 115663531 in words is "one hundred fifteen million, six hundred sixty-three thousand, five hundred thirty-one".