57290261 has 20 divisors (see below), whose sum is σ = 67761792. Its totient is φ = 48428856.

The previous prime is 57290251. The next prime is 57290267. The reversal of 57290261 is 16209275.

57290261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 57290261 - 2⁶ = 57290197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57290267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 256796 + ... + 257018.

Almost surely, 2^57290261 is an apocalyptic number.

It is an amenable number.

57290261 is a deficient number, since it is larger than the sum of its proper divisors (10471531).

57290261 is an equidigital number, since it uses as much as digits as its factorization.

57290261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 57290261 is about 7569.0330293902. The cubic root of 57290261 is about 385.5022645793.

The spelling of 57290261 in words is "fifty-seven million, two hundred ninety thousand, two hundred sixty-one".