57216502 has 16 divisors (see below), whose sum is σ = 102350592. Its totient is φ = 23455080.

The previous prime is 57216499. The next prime is 57216503. The reversal of 57216502 is 20561275.

It is a super-2 number, since 2×57216502² = 6547456202232008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57216503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88524 + ... + 89167.

It is an arithmetic number, because the mean of its divisors is an integer number (6396912).

Almost surely, 2^57216502 is an apocalyptic number.

57216502 is a deficient number, since it is larger than the sum of its proper divisors (45134090).

57216502 is a wasteful number, since it uses less digits than its factorization.

57216502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177723.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 57216502 is about 7564.1590411625. The cubic root of 57216502 is about 385.3367537668.

Adding to 57216502 its reverse (20561275), we get a palindrome (77777777).

The spelling of 57216502 in words is "fifty-seven million, two hundred sixteen thousand, five hundred two".