115705531 has 2 divisors, whose sum is σ = 115705532. Its totient is φ = 115705530.

The previous prime is 115705529. The next prime is 115705591. The reversal of 115705531 is 135507511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115705531 - 2¹ = 115705529 is a prime.

It is a super-2 number, since 2×115705531² = 26775539807983922, which contains 22 as substring.

Together with 115705529, it forms a pair of twin primes.

It is equal to p_6610663 and since 115705531 and 6610663 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115705531.

It is not a weakly prime, because it can be changed into another prime (115705501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57852765 + 57852766.

It is an arithmetic number, because the mean of its divisors is an integer number (57852766).

Almost surely, 2^115705531 is an apocalyptic number.

115705531 is a deficient number, since it is larger than the sum of its proper divisors (1).

115705531 is an equidigital number, since it uses as much as digits as its factorization.

115705531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2625, while the sum is 28.

The square root of 115705531 is about 10756.6505474520. The cubic root of 115705531 is about 487.2868668150.

The spelling of 115705531 in words is "one hundred fifteen million, seven hundred five thousand, five hundred thirty-one".