57542212 has 72 divisors (see below), whose sum is σ = 131897024. Its totient is φ = 21385728.

The previous prime is 57542209. The next prime is 57542237. The reversal of 57542212 is 21224575.

It is a super-2 number, since 2×57542212² = 6622212323705888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 104923 + ... + 105469.

Almost surely, 2^57542212 is an apocalyptic number.

57542212 is a gapful number since it is divisible by the number (52) 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 57542212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65948512).

57542212 is an abundant number, since it is smaller than the sum of its proper divisors (74354812).

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

57542212 is a wasteful number, since it uses less digits than its factorization.

57542212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 586 counting only the distinct ones).

The product of its digits is 5600, while the sum is 28.

The square root of 57542212 is about 7585.6583102589. The cubic root of 57542212 is about 386.0665585423.

Adding to 57542212 its reverse (21224575), we get a palindrome (78766787).

The spelling of 57542212 in words is "fifty-seven million, five hundred forty-two thousand, two hundred twelve".