57208505 has 8 divisors (see below), whose sum is σ = 69048072. Its totient is φ = 45501568.

The previous prime is 57208493. The next prime is 57208507. The reversal of 57208505 is 50580275.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25725184 + 31483321 = 5072^2 + 5611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57208505 - 2⁶ = 57208441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57208507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32204 + ... + 33933.

It is an arithmetic number, because the mean of its divisors is an integer number (8631009).

Almost surely, 2^57208505 is an apocalyptic number.

It is an amenable number.

57208505 is a deficient number, since it is larger than the sum of its proper divisors (11839567).

57208505 is a wasteful number, since it uses less digits than its factorization.

57208505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66315.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 57208505 is about 7563.6304113831. The cubic root of 57208505 is about 385.3188004288.

The spelling of 57208505 in words is "fifty-seven million, two hundred eight thousand, five hundred five".