55647550 has 24 divisors (see below), whose sum is σ = 118291536. Its totient is φ = 19079040.

The previous prime is 55647533. The next prime is 55647589. The reversal of 55647550 is 5574655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79147 + ... + 79846.

It is an arithmetic number, because the mean of its divisors is an integer number (4928814).

Almost surely, 2^55647550 is an apocalyptic number.

55647550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55647550 is an abundant number, since it is smaller than the sum of its proper divisors (62643986).

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

55647550 is a wasteful number, since it uses less digits than its factorization.

55647550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159012 (or 159007 counting only the distinct ones).

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 55647550 is about 7459.7285473400. The cubic root of 55647550 is about 381.7819127406.

The spelling of 55647550 in words is "fifty-five million, six hundred forty-seven thousand, five hundred fifty".