52991469 has 16 divisors (see below), whose sum is σ = 78638400. Its totient is φ = 35268048.

The previous prime is 52991461. The next prime is 52991483. The reversal of 52991469 is 96419925.

It is not a de Polignac number, because 52991469 - 2³ = 52991461 is a prime.

It is a super-2 number, since 2×52991469² = 5616191573555922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52991461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19602 + ... + 22140.

It is an arithmetic number, because the mean of its divisors is an integer number (4914900).

Almost surely, 2^52991469 is an apocalyptic number.

It is an amenable number.

52991469 is a deficient number, since it is larger than the sum of its proper divisors (25646931).

52991469 is a wasteful number, since it uses less digits than its factorization.

52991469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321 (or 3315 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 52991469 is about 7279.5239542157. The cubic root of 52991469 is about 375.6084203320.

The spelling of 52991469 in words is "fifty-two million, nine hundred ninety-one thousand, four hundred sixty-nine".