52217520 has 40 divisors (see below), whose sum is σ = 161875056. Its totient is φ = 13924608.

The previous prime is 52217519. The next prime is 52217531. The reversal of 52217520 is 2571225.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108547 + ... + 109026.

Almost surely, 2^52217520 is an apocalyptic number.

It is an amenable number.

52217520 is an abundant number, since it is smaller than the sum of its proper divisors (109657536).

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

52217520 is a wasteful number, since it uses less digits than its factorization.

52217520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217589 (or 217583 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 52217520 is about 7226.1691095628. The cubic root of 52217520 is about 373.7708377177.

Adding to 52217520 its reverse (2571225), we get a palindrome (54788745).

The spelling of 52217520 in words is "fifty-two million, two hundred seventeen thousand, five hundred twenty".