115378531 has 2 divisors, whose sum is σ = 115378532. Its totient is φ = 115378530.

The previous prime is 115378519. The next prime is 115378657. The reversal of 115378531 is 135873511.

It is a weak prime.

It is an emirp because it is prime and its reverse (135873511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115378531 - 2⁵ = 115378499 is a prime.

It is a super-2 number, since 2×115378531² = 26624410831435922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (115378831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57689265 + 57689266.

It is an arithmetic number, because the mean of its divisors is an integer number (57689266).

Almost surely, 2^115378531 is an apocalyptic number.

115378531 is a deficient number, since it is larger than the sum of its proper divisors (1).

115378531 is an equidigital number, since it uses as much as digits as its factorization.

115378531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 115378531 is about 10741.4398941669. The cubic root of 115378531 is about 486.8273867638.

The spelling of 115378531 in words is "one hundred fifteen million, three hundred seventy-eight thousand, five hundred thirty-one".