57120551 has 4 divisors (see below), whose sum is σ = 57195600. Its totient is φ = 57045504.

The previous prime is 57120533. The next prime is 57120571. The reversal of 57120551 is 15502175.

It is a happy number.

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-57120551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57120551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57120571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36371 + ... + 37908.

It is an arithmetic number, because the mean of its divisors is an integer number (14298900).

Almost surely, 2^57120551 is an apocalyptic number.

57120551 is a deficient number, since it is larger than the sum of its proper divisors (75049).

57120551 is an equidigital number, since it uses as much as digits as its factorization.

57120551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75048.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 57120551 is about 7557.8139035041. The cubic root of 57120551 is about 385.1212324121.

The spelling of 57120551 in words is "fifty-seven million, one hundred twenty thousand, five hundred fifty-one".