52133240 has 16 divisors (see below), whose sum is σ = 117299880. Its totient is φ = 20853280.

The previous prime is 52133239. The next prime is 52133251. The reversal of 52133240 is 4233125.

It is a happy number.

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

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, 651626 + ... + 651705.

Almost surely, 2^52133240 is an apocalyptic number.

It is an amenable number.

52133240 is an abundant number, since it is smaller than the sum of its proper divisors (65166640).

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

52133240 is a wasteful number, since it uses less digits than its factorization.

52133240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303342 (or 1303338 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 52133240 is about 7220.3351722756. The cubic root of 52133240 is about 373.5696385202.

Adding to 52133240 its reverse (4233125), we get a palindrome (56366365).

The spelling of 52133240 in words is "fifty-two million, one hundred thirty-three thousand, two hundred forty".