57136261 has 16 divisors (see below), whose sum is σ = 70850304. Its totient is φ = 44866944.

The previous prime is 57136259. The next prime is 57136267. The reversal of 57136261 is 16263175.

It is a cyclic number.

It is not a de Polignac number, because 57136261 - 2¹ = 57136259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57136267) 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, 10176 + ... + 14758.

It is an arithmetic number, because the mean of its divisors is an integer number (4428144).

Almost surely, 2^57136261 is an apocalyptic number.

It is an amenable number.

57136261 is a deficient number, since it is larger than the sum of its proper divisors (13714043).

57136261 is a wasteful number, since it uses less digits than its factorization.

57136261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4740.

The product of its digits is 7560, while the sum is 31.

The square root of 57136261 is about 7558.8531537529. The cubic root of 57136261 is about 385.1565361097.

The spelling of 57136261 in words is "fifty-seven million, one hundred thirty-six thousand, two hundred sixty-one".