52281587 has 4 divisors (see below), whose sum is σ = 52329840. Its totient is φ = 52233336.

The previous prime is 52281571. The next prime is 52281589. The reversal of 52281587 is 78518225.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 52281587 - 2⁴ = 52281571 is a prime.

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 52281587.

It is not an unprimeable number, because it can be changed into a prime (52281589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22463 + ... + 24680.

It is an arithmetic number, because the mean of its divisors is an integer number (13082460).

Almost surely, 2^52281587 is an apocalyptic number.

52281587 is a deficient number, since it is larger than the sum of its proper divisors (48253).

52281587 is a wasteful number, since it uses less digits than its factorization.

52281587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48252.

The product of its digits is 44800, while the sum is 38.

The square root of 52281587 is about 7230.6007357619. The cubic root of 52281587 is about 373.9236382175.

The spelling of 52281587 in words is "fifty-two million, two hundred eighty-one thousand, five hundred eighty-seven".