57742251 has 16 divisors (see below), whose sum is σ = 93164544. Its totient is φ = 31054464.

The previous prime is 57742247. The next prime is 57742291. The reversal of 57742251 is 15224775.

It is not a de Polignac number, because 57742251 - 2² = 57742247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57742291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80515 + ... + 81228.

It is an arithmetic number, because the mean of its divisors is an integer number (5822784).

Almost surely, 2^57742251 is an apocalyptic number.

57742251 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

57742251 is a deficient number, since it is larger than the sum of its proper divisors (35422293).

57742251 is a wasteful number, since it uses less digits than its factorization.

57742251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161770.

The product of its digits is 19600, while the sum is 33.

The square root of 57742251 is about 7598.8322129127. The cubic root of 57742251 is about 386.5134133883.

The spelling of 57742251 in words is "fifty-seven million, seven hundred forty-two thousand, two hundred fifty-one".