52087281 has 8 divisors (see below), whose sum is σ = 69514080. Its totient is φ = 34692672.

The previous prime is 52087267. The next prime is 52087297. The reversal of 52087281 is 18278025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52087281 - 2¹³ = 52079089 is a prime.

It is a super-2 number, since 2×52087281² = 5426169683945922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52087241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3976 + ... + 10953.

It is an arithmetic number, because the mean of its divisors is an integer number (8689260).

Almost surely, 2^52087281 is an apocalyptic number.

It is an amenable number.

52087281 is a deficient number, since it is larger than the sum of its proper divisors (17426799).

52087281 is a wasteful number, since it uses less digits than its factorization.

52087281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16095.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 52087281 is about 7217.1518620575. The cubic root of 52087281 is about 373.4598305572.

The spelling of 52087281 in words is "fifty-two million, eighty-seven thousand, two hundred eighty-one".