55391336 has 64 divisors (see below), whose sum is σ = 139466880. Its totient is φ = 19918080.

The previous prime is 55391317. The next prime is 55391341. The reversal of 55391336 is 63319355.

It is a junction number, because it is equal to n+sod(n) for n = 55391296 and 55391305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4550 + ... + 11466.

It is an arithmetic number, because the mean of its divisors is an integer number (2179170).

Almost surely, 2^55391336 is an apocalyptic number.

55391336 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55391336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69733440).

55391336 is an abundant number, since it is smaller than the sum of its proper divisors (84075544).

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

55391336 is a wasteful number, since it uses less digits than its factorization.

55391336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954 (or 6950 counting only the distinct ones).

The product of its digits is 36450, while the sum is 35.

The square root of 55391336 is about 7442.5355894346. The cubic root of 55391336 is about 381.1950741979.

The spelling of 55391336 in words is "fifty-five million, three hundred ninety-one thousand, three hundred thirty-six".