57220556 has 12 divisors (see below), whose sum is σ = 100479792. Its totient is φ = 28512048.

The previous prime is 57220529. The next prime is 57220561. The reversal of 57220556 is 65502275.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23240 + ... + 25583.

It is an arithmetic number, because the mean of its divisors is an integer number (8373316).

Almost surely, 2^57220556 is an apocalyptic number.

It is an amenable number.

57220556 is a deficient number, since it is larger than the sum of its proper divisors (43259236).

57220556 is a wasteful number, since it uses less digits than its factorization.

57220556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49120 (or 49118 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 57220556 is about 7564.4270106863. The cubic root of 57220556 is about 385.3458543948.

The spelling of 57220556 in words is "fifty-seven million, two hundred twenty thousand, five hundred fifty-six".