57215243 has 8 divisors (see below), whose sum is σ = 59222400. Its totient is φ = 55218240.

The previous prime is 57215233. The next prime is 57215267. The reversal of 57215243 is 34251275.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57215243 - 2¹⁶ = 57149707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57215203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9983 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (7402800).

Almost surely, 2^57215243 is an apocalyptic number.

57215243 is a deficient number, since it is larger than the sum of its proper divisors (2007157).

57215243 is a wasteful number, since it uses less digits than its factorization.

57215243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5077.

The product of its digits is 8400, while the sum is 29.

The square root of 57215243 is about 7564.0758192921. The cubic root of 57215243 is about 385.3339274112. Note that the first 3 decimals are identical.

The spelling of 57215243 in words is "fifty-seven million, two hundred fifteen thousand, two hundred forty-three".