53001540 has 60 divisors (see below), whose sum is σ = 166272876. Its totient is φ = 14133312.

The previous prime is 53001539. The next prime is 53001541. The reversal of 53001540 is 4510035.

It is an interprime number because it is at equal distance from previous prime (53001539) and next prime (53001541).

It can be written as a sum of positive squares in 2 ways, for example, as 35712576 + 17288964 = 5976^2 + 4158^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (53001541) 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, 14739 + ... + 17978.

Almost surely, 2^53001540 is an apocalyptic number.

It is an amenable number.

53001540 is an abundant number, since it is smaller than the sum of its proper divisors (113271336).

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

53001540 is a wasteful number, since it uses less digits than its factorization.

53001540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32738 (or 32727 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 53001540 is about 7280.2156561465. The cubic root of 53001540 is about 375.6322135504.

Adding to 53001540 its reverse (4510035), we get a palindrome (57511575).

The spelling of 53001540 in words is "fifty-three million, one thousand, five hundred forty".