115212057 has 4 divisors (see below), whose sum is σ = 153616080. Its totient is φ = 76808036.

The previous prime is 115212049. The next prime is 115212079. The reversal of 115212057 is 750212511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115212057 - 2³ = 115212049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115212017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19202007 + ... + 19202012.

It is an arithmetic number, because the mean of its divisors is an integer number (38404020).

Almost surely, 2^115212057 is an apocalyptic number.

It is an amenable number.

115212057 is a deficient number, since it is larger than the sum of its proper divisors (38404023).

115212057 is an equidigital number, since it uses as much as digits as its factorization.

115212057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38404022.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 115212057 is about 10733.6879496285. The cubic root of 115212057 is about 486.5931343105.

Adding to 115212057 its reverse (750212511), we get a palindrome (865424568).

The spelling of 115212057 in words is "one hundred fifteen million, two hundred twelve thousand, fifty-seven".