57540251 has 4 divisors (see below), whose sum is σ = 57664992. Its totient is φ = 57415512.

The previous prime is 57540239. The next prime is 57540269. The reversal of 57540251 is 15204575.

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 57540251 - 2¹⁴ = 57523867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57540221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61676 + ... + 62601.

It is an arithmetic number, because the mean of its divisors is an integer number (14416248).

Almost surely, 2^57540251 is an apocalyptic number.

57540251 is a deficient number, since it is larger than the sum of its proper divisors (124741).

57540251 is a wasteful number, since it uses less digits than its factorization.

57540251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124740.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 57540251 is about 7585.5290520833. The cubic root of 57540251 is about 386.0621728627.

The spelling of 57540251 in words is "fifty-seven million, five hundred forty thousand, two hundred fifty-one".