52388281 has 6 divisors (see below), whose sum is σ = 57583946. Its totient is φ = 47625600.

The previous prime is 52388279. The next prime is 52388299. The reversal of 52388281 is 18288325.

It can be written as a sum of positive squares in only one way, i.e., 50183056 + 2205225 = 7084^2 + 1485^2 .

It is not a de Polignac number, because 52388281 - 2¹ = 52388279 is a prime.

It is a super-2 number, since 2×52388281² = 5489063972269922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52388281.

It is not an unprimeable number, because it can be changed into a prime (52388981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216360 + ... + 216601.

Almost surely, 2^52388281 is an apocalyptic number.

It is an amenable number.

52388281 is a deficient number, since it is larger than the sum of its proper divisors (5195665).

52388281 is a wasteful number, since it uses less digits than its factorization.

52388281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432983 (or 432972 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 52388281 is about 7237.9749239687. The cubic root of 52388281 is about 374.1778277753.

It can be divided in two parts, 523 and 88281, that added together give a square (88804 = 298²).

The spelling of 52388281 in words is "fifty-two million, three hundred eighty-eight thousand, two hundred eighty-one".