52511240 has 32 divisors (see below), whose sum is σ = 120092760. Its totient is φ = 20659200.

The previous prime is 52511233. The next prime is 52511243. The reversal of 52511240 is 4211525.

It can be written as a sum of positive squares in 4 ways, for example, as 27730756 + 24780484 = 5266^2 + 4978^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8321 + ... + 13200.

Almost surely, 2^52511240 is an apocalyptic number.

It is an amenable number.

52511240 is an abundant number, since it is smaller than the sum of its proper divisors (67581520).

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

52511240 is a wasteful number, since it uses less digits than its factorization.

52511240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21593 (or 21589 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 52511240 is about 7246.4639652730. The cubic root of 52511240 is about 374.4703396527.

Adding to 52511240 its reverse (4211525), we get a palindrome (56722765).

The spelling of 52511240 in words is "fifty-two million, five hundred eleven thousand, two hundred forty".