52991472 has 20 divisors (see below), whose sum is σ = 136894760. Its totient is φ = 17663808.

The previous prime is 52991461. The next prime is 52991483. The reversal of 52991472 is 27419925.

It is an interprime number because it is at equal distance from previous prime (52991461) and next prime (52991483).

It is a super-2 number, since 2×52991472² = 5616192209453568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52991472.

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, 551947 + ... + 552042.

It is an arithmetic number, because the mean of its divisors is an integer number (6844738).

Almost surely, 2^52991472 is an apocalyptic number.

It is an amenable number.

52991472 is an abundant number, since it is smaller than the sum of its proper divisors (83903288).

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

52991472 is a wasteful number, since it uses less digits than its factorization.

52991472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104000 (or 1103994 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 52991472 is about 7279.5241602731. The cubic root of 52991472 is about 375.6084274201.

The spelling of 52991472 in words is "fifty-two million, nine hundred ninety-one thousand, four hundred seventy-two".