55805156 has 12 divisors (see below), whose sum is σ = 106537200. Its totient is φ = 25365960.

The previous prime is 55805149. The next prime is 55805159. The reversal of 55805156 is 65150855.

It is a super-2 number, since 2×55805156² = 6228430872368672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55805159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 634106 + ... + 634193.

It is an arithmetic number, because the mean of its divisors is an integer number (8878100).

Almost surely, 2^55805156 is an apocalyptic number.

It is an amenable number.

55805156 is a deficient number, since it is larger than the sum of its proper divisors (50732044).

55805156 is a wasteful number, since it uses less digits than its factorization.

55805156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268314 (or 1268312 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 55805156 is about 7470.2848673929. The cubic root of 55805156 is about 382.1420028879.

The spelling of 55805156 in words is "fifty-five million, eight hundred five thousand, one hundred fifty-six".