57240971 has 4 divisors (see below), whose sum is σ = 58458912. Its totient is φ = 56023032.

The previous prime is 57240923. The next prime is 57240991. The reversal of 57240971 is 17904275.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57240971 - 2⁶ = 57240907 is a prime.

It is a super-2 number, since 2×57240971² = 6553057522045682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57240991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608900 + ... + 608993.

It is an arithmetic number, because the mean of its divisors is an integer number (14614728).

Almost surely, 2^57240971 is an apocalyptic number.

57240971 is a deficient number, since it is larger than the sum of its proper divisors (1217941).

57240971 is a wasteful number, since it uses less digits than its factorization.

57240971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217940.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 57240971 is about 7565.7762985698. The cubic root of 57240971 is about 385.3916765071.

The spelling of 57240971 in words is "fifty-seven million, two hundred forty thousand, nine hundred seventy-one".