55643469 has 24 divisors (see below), whose sum is σ = 86889888. Its totient is φ = 31580640.

The previous prime is 55643461. The next prime is 55643503. The reversal of 55643469 is 96434655.

It is not a de Polignac number, because 55643469 - 2³ = 55643461 is a prime.

It is a super-2 number, since 2×55643469² = 6192391284707922, 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 55643469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55643461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21874 + ... + 24284.

It is an arithmetic number, because the mean of its divisors is an integer number (3620412).

Almost surely, 2^55643469 is an apocalyptic number.

It is an amenable number.

55643469 is a deficient number, since it is larger than the sum of its proper divisors (31246419).

55643469 is a wasteful number, since it uses less digits than its factorization.

55643469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585 (or 2578 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The square root of 55643469 is about 7459.4550069023. The cubic root of 55643469 is about 381.7725796548.

The spelling of 55643469 in words is "fifty-five million, six hundred forty-three thousand, four hundred sixty-nine".