55591338 has 16 divisors (see below), whose sum is σ = 121290336. Its totient is φ = 16845840.

The previous prime is 55591337. The next prime is 55591351. The reversal of 55591338 is 83319555.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55591296 and 55591305.

It is not an unprimeable number, because it can be changed into a prime (55591331) 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, 421081 + ... + 421212.

It is an arithmetic number, because the mean of its divisors is an integer number (7580646).

Almost surely, 2^55591338 is an apocalyptic number.

55591338 is an abundant number, since it is smaller than the sum of its proper divisors (65698998).

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

55591338 is a wasteful number, since it uses less digits than its factorization.

55591338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842309.

The product of its digits is 81000, while the sum is 39.

The square root of 55591338 is about 7455.9598979608. The cubic root of 55591338 is about 381.6533179502.

The spelling of 55591338 in words is "fifty-five million, five hundred ninety-one thousand, three hundred thirty-eight".