52511247 has 20 divisors (see below), whose sum is σ = 78872640. Its totient is φ = 34815744.

The previous prime is 52511243. The next prime is 52511273. The reversal of 52511247 is 74211525.

It is not a de Polignac number, because 52511247 - 2² = 52511243 is a prime.

It is a super-2 number, since 2×52511247² = 5514862122990018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 52511247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52511243) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13954 + ... + 17312.

It is an arithmetic number, because the mean of its divisors is an integer number (3943632).

Almost surely, 2^52511247 is an apocalyptic number.

52511247 is a deficient number, since it is larger than the sum of its proper divisors (26361393).

52511247 is a wasteful number, since it uses less digits than its factorization.

52511247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564 (or 3555 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 52511247 is about 7246.4644482672. The cubic root of 52511247 is about 374.4703562923.

The spelling of 52511247 in words is "fifty-two million, five hundred eleven thousand, two hundred forty-seven".