83215057 has 4 divisors (see below), whose sum is σ = 83336176. Its totient is φ = 83093940.

The previous prime is 83215049. The next prime is 83215063. The reversal of 83215057 is 75051238.

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 83215057 - 2³ = 83215049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83215037) 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, 59523 + ... + 60904.

It is an arithmetic number, because the mean of its divisors is an integer number (20834044).

Almost surely, 2^83215057 is an apocalyptic number.

It is an amenable number.

83215057 is a deficient number, since it is larger than the sum of its proper divisors (121119).

83215057 is a wasteful number, since it uses less digits than its factorization.

83215057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121118.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 83215057 is about 9122.2287298664. The cubic root of 83215057 is about 436.5834867363.

The spelling of 83215057 in words is "eighty-three million, two hundred fifteen thousand, fifty-seven".