57022261 has 6 divisors (see below), whose sum is σ = 58008662. Its totient is φ = 56052360.

The previous prime is 57022253. The next prime is 57022283. The reversal of 57022261 is 16222075.

It can be written as a sum of positive squares in only one way, i.e., 28826161 + 28196100 = 5369^2 + 5310^2 .

It is not a de Polignac number, because 57022261 - 2³ = 57022253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57022201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4710 + ... + 11671.

Almost surely, 2^57022261 is an apocalyptic number.

It is an amenable number.

57022261 is a deficient number, since it is larger than the sum of its proper divisors (986401).

57022261 is an equidigital number, since it uses as much as digits as its factorization.

57022261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16499 (or 16440 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 57022261 is about 7551.3085620970. The cubic root of 57022261 is about 384.9002068898.

The spelling of 57022261 in words is "fifty-seven million, twenty-two thousand, two hundred sixty-one".