52287261 has 32 divisors (see below), whose sum is σ = 78744960. Its totient is φ = 30637824.

The previous prime is 52287251. The next prime is 52287271. The reversal of 52287261 is 16278225.

It is an interprime number because it is at equal distance from previous prime (52287251) and next prime (52287271).

It is not a de Polignac number, because 52287261 - 2⁹ = 52286749 is a prime.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52287241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93595 + ... + 94151.

It is an arithmetic number, because the mean of its divisors is an integer number (2460780).

Almost surely, 2^52287261 is an apocalyptic number.

It is an amenable number.

52287261 is a deficient number, since it is larger than the sum of its proper divisors (26457699).

52287261 is a wasteful number, since it uses less digits than its factorization.

52287261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685.

The product of its digits is 13440, while the sum is 33.

The square root of 52287261 is about 7230.9930853238. The cubic root of 52287261 is about 373.9371647514.

The spelling of 52287261 in words is "fifty-two million, two hundred eighty-seven thousand, two hundred sixty-one".