55531869 has 8 divisors (see below), whose sum is σ = 75085632. Its totient is φ = 36499680.

The previous prime is 55531859. The next prime is 55531891. The reversal of 55531869 is 96813555.

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

It is not a de Polignac number, because 55531869 - 2⁵ = 55531837 is a prime.

It is a super-2 number, since 2×55531869² = 6167576949266322, 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 55531869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55531829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130144 + ... + 130569.

It is an arithmetic number, because the mean of its divisors is an integer number (9385704).

Almost surely, 2^55531869 is an apocalyptic number.

It is an amenable number.

55531869 is a deficient number, since it is larger than the sum of its proper divisors (19553763).

55531869 is a wasteful number, since it uses less digits than its factorization.

55531869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260787.

The product of its digits is 162000, while the sum is 42.

The square root of 55531869 is about 7451.9708131474. The cubic root of 55531869 is about 381.5171778007.

The spelling of 55531869 in words is "fifty-five million, five hundred thirty-one thousand, eight hundred sixty-nine".