57240533 has 4 divisors (see below), whose sum is σ = 65417760. Its totient is φ = 49063308.

The previous prime is 57240529. The next prime is 57240563. The reversal of 57240533 is 33504275.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 57240533 - 2² = 57240529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57240496 and 57240505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57240523) 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, 4088603 + ... + 4088616.

It is an arithmetic number, because the mean of its divisors is an integer number (16354440).

Almost surely, 2^57240533 is an apocalyptic number.

It is an amenable number.

57240533 is a deficient number, since it is larger than the sum of its proper divisors (8177227).

57240533 is an equidigital number, since it uses as much as digits as its factorization.

57240533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8177226.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 57240533 is about 7565.7473523770. The cubic root of 57240533 is about 385.3906935167.

The spelling of 57240533 in words is "fifty-seven million, two hundred forty thousand, five hundred thirty-three".