57016520 has 64 divisors (see below), whose sum is σ = 141445440. Its totient is φ = 20512000.

The previous prime is 57016513. The next prime is 57016573. The reversal of 57016520 is 2561075.

It is a self number, because there is not a number n which added to its sum of digits gives 57016520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43799 + ... + 45081.

It is an arithmetic number, because the mean of its divisors is an integer number (2210085).

Almost surely, 2^57016520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57016520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70722720).

57016520 is an abundant number, since it is smaller than the sum of its proper divisors (84428920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57016520 is a wasteful number, since it uses less digits than its factorization.

57016520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 57016520 is about 7550.9284197375. The cubic root of 57016520 is about 384.8872892081.

Adding to 57016520 its reverse (2561075), we get a palindrome (59577595).

Subtracting from 57016520 its reverse (2561075), we obtain a palindrome (54455445).

It can be divided in two parts, 5701 and 6520, that added together give a palindrome (12221).

The spelling of 57016520 in words is "fifty-seven million, sixteen thousand, five hundred twenty".