57206399 has 4 divisors (see below), whose sum is σ = 57379560. Its totient is φ = 57033240.

The previous prime is 57206381. The next prime is 57206407. The reversal of 57206399 is 99360275.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57206399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57206599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86084 + ... + 86745.

It is an arithmetic number, because the mean of its divisors is an integer number (14344890).

Almost surely, 2^57206399 is an apocalyptic number.

57206399 is a deficient number, since it is larger than the sum of its proper divisors (173161).

57206399 is a wasteful number, since it uses less digits than its factorization.

57206399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173160.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 57206399 is about 7563.4911912423. The cubic root of 57206399 is about 385.3140721612.

The spelling of 57206399 in words is "fifty-seven million, two hundred six thousand, three hundred ninety-nine".