53531540 has 12 divisors (see below), whose sum is σ = 112416276. Its totient is φ = 21412608.

The previous prime is 53531539. The next prime is 53531551. The reversal of 53531540 is 4513535.

It can be written as a sum of positive squares in 2 ways, for example, as 42588676 + 10942864 = 6526^2 + 3308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338269 + ... + 1338308.

It is an arithmetic number, because the mean of its divisors is an integer number (9368023).

Almost surely, 2^53531540 is an apocalyptic number.

It is an amenable number.

53531540 is an abundant number, since it is smaller than the sum of its proper divisors (58884736).

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

53531540 is a wasteful number, since it uses less digits than its factorization.

53531540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676586 (or 2676584 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 53531540 is about 7316.5251315088. The cubic root of 53531540 is about 376.8801341310.

The spelling of 53531540 in words is "fifty-three million, five hundred thirty-one thousand, five hundred forty".