52101540 has 36 divisors (see below), whose sum is σ = 158041884. Its totient is φ = 13893696.

The previous prime is 52101523. The next prime is 52101541. The reversal of 52101540 is 4510125.

It can be written as a sum of positive squares in 2 ways, for example, as 41447844 + 10653696 = 6438^2 + 3264^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 (52101541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144547 + ... + 144906.

Almost surely, 2^52101540 is an apocalyptic number.

It is an amenable number.

52101540 is an abundant number, since it is smaller than the sum of its proper divisors (105940344).

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

52101540 is a wasteful number, since it uses less digits than its factorization.

52101540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289468 (or 289463 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 52101540 is about 7218.1396495219. The cubic root of 52101540 is about 373.4939059128.

Adding to 52101540 its reverse (4510125), we get a palindrome (56611665).

The spelling of 52101540 in words is "fifty-two million, one hundred one thousand, five hundred forty".