52331540 has 12 divisors (see below), whose sum is σ = 109896276. Its totient is φ = 20932608.

The previous prime is 52331497. The next prime is 52331549. The reversal of 52331540 is 4513325.

It can be written as a sum of positive squares in 2 ways, for example, as 18645124 + 33686416 = 4318^2 + 5804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52331549) 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, 1308269 + ... + 1308308.

It is an arithmetic number, because the mean of its divisors is an integer number (9158023).

Almost surely, 2^52331540 is an apocalyptic number.

It is an amenable number.

52331540 is an abundant number, since it is smaller than the sum of its proper divisors (57564736).

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

52331540 is a wasteful number, since it uses less digits than its factorization.

52331540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616586 (or 2616584 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 52331540 is about 7234.0541883511. The cubic root of 52331540 is about 374.0426900854.

Adding to 52331540 its reverse (4513325), we get a palindrome (56844865).

The spelling of 52331540 in words is "fifty-two million, three hundred thirty-one thousand, five hundred forty".