76215057 has 4 divisors (see below), whose sum is σ = 101620080. Its totient is φ = 50810036.

The previous prime is 76215043. The next prime is 76215101. The reversal of 76215057 is 75051267.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75051267 = 3 ⋅25017089.

It is a cyclic number.

It is not a de Polignac number, because 76215057 - 2¹² = 76210961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76215457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12702507 + ... + 12702512.

It is an arithmetic number, because the mean of its divisors is an integer number (25405020).

Almost surely, 2^76215057 is an apocalyptic number.

It is an amenable number.

76215057 is a deficient number, since it is larger than the sum of its proper divisors (25405023).

76215057 is a wasteful number, since it uses less digits than its factorization.

76215057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25405022.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 76215057 is about 8730.1235386448. The cubic root of 76215057 is about 423.9815187892.

The spelling of 76215057 in words is "seventy-six million, two hundred fifteen thousand, fifty-seven".