52291278 has 32 divisors (see below), whose sum is σ = 125143200. Its totient is φ = 16089408.

The previous prime is 52291273. The next prime is 52291297. The reversal of 52291278 is 87219225.

52291278 is a `hidden beast` number, since 522 + 9 + 127 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52291273) 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, 36543 + ... + 37946.

It is an arithmetic number, because the mean of its divisors is an integer number (3910725).

Almost surely, 2^52291278 is an apocalyptic number.

52291278 is an abundant number, since it is smaller than the sum of its proper divisors (72851922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52291278 is a wasteful number, since it uses less digits than its factorization.

52291278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74513 (or 74507 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 52291278 is about 7231.2708426666. The cubic root of 52291278 is about 373.9467404880.

The spelling of 52291278 in words is "fifty-two million, two hundred ninety-one thousand, two hundred seventy-eight".