57231709 has 2 divisors, whose sum is σ = 57231710. Its totient is φ = 57231708.

The previous prime is 57231697. The next prime is 57231731. The reversal of 57231709 is 90713275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39967684 + 17264025 = 6322^2 + 4155^2 .

It is a cyclic number.

It is not a de Polignac number, because 57231709 - 2¹¹ = 57229661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57231739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28615854 + 28615855.

It is an arithmetic number, because the mean of its divisors is an integer number (28615855).

Almost surely, 2^57231709 is an apocalyptic number.

It is an amenable number.

57231709 is a deficient number, since it is larger than the sum of its proper divisors (1).

57231709 is an equidigital number, since it uses as much as digits as its factorization.

57231709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 57231709 is about 7565.1641753501. The cubic root of 57231709 is about 385.3708890060.

The spelling of 57231709 in words is "fifty-seven million, two hundred thirty-one thousand, seven hundred nine".