57213100 has 108 divisors (see below), whose sum is σ = 148889776. Its totient is φ = 18679680.

The previous prime is 57213089. The next prime is 57213133. The reversal of 57213100 is 131275.

It is a super-2 number, since 2×57213100² = 6546677623220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1217277 + ... + 1217323.

Almost surely, 2^57213100 is an apocalyptic number.

57213100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57213100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74444888).

57213100 is an abundant number, since it is smaller than the sum of its proper divisors (91676676).

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

57213100 is a wasteful number, since it uses less digits than its factorization.

57213100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 57213100 is about 7563.9341615326. The cubic root of 57213100 is about 385.3291164502.

Adding to 57213100 its reverse (131275), we get a palindrome (57344375).

The spelling of 57213100 in words is "fifty-seven million, two hundred thirteen thousand, one hundred".