57872261 has 2 divisors, whose sum is σ = 57872262. Its totient is φ = 57872260.

The previous prime is 57872251. The next prime is 57872299. The reversal of 57872261 is 16227875.

It is an a-pointer prime, because the next prime (57872299) can be obtained adding 57872261 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57851236 + 21025 = 7606^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 57872261 - 2¹⁸ = 57610117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57872251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28936130 + 28936131.

It is an arithmetic number, because the mean of its divisors is an integer number (28936131).

Almost surely, 2^57872261 is an apocalyptic number.

It is an amenable number.

57872261 is a deficient number, since it is larger than the sum of its proper divisors (1).

57872261 is an equidigital number, since it uses as much as digits as its factorization.

57872261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 57872261 is about 7607.3820069719. The cubic root of 57872261 is about 386.8032816740.

The spelling of 57872261 in words is "fifty-seven million, eight hundred seventy-two thousand, two hundred sixty-one".