55133409 has 8 divisors (see below), whose sum is σ = 74898432. Its totient is φ = 36062000.

The previous prime is 55133401. The next prime is 55133413. The reversal of 55133409 is 90433155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55133409 - 2³ = 55133401 is a prime.

It is a super-2 number, since 2×55133409² = 6079385575922562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55133401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173217 + ... + 173534.

It is an arithmetic number, because the mean of its divisors is an integer number (9362304).

Almost surely, 2^55133409 is an apocalyptic number.

It is an amenable number.

55133409 is a deficient number, since it is larger than the sum of its proper divisors (19765023).

55133409 is a wasteful number, since it uses less digits than its factorization.

55133409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346807.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 55133409 is about 7425.1874723807. The cubic root of 55133409 is about 380.6024814857.

The spelling of 55133409 in words is "fifty-five million, one hundred thirty-three thousand, four hundred nine".