55496220 has 96 divisors (see below), whose sum is σ = 168732480. Its totient is φ = 13628160.

The previous prime is 55496219. The next prime is 55496249. The reversal of 55496220 is 2269455.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131610 + ... + 132030.

It is an arithmetic number, because the mean of its divisors is an integer number (1757630).

Almost surely, 2^55496220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55496220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84366240).

55496220 is an abundant number, since it is smaller than the sum of its proper divisors (113236260).

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

55496220 is a wasteful number, since it uses less digits than its factorization.

55496220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 55496220 is about 7449.5785115669. The cubic root of 55496220 is about 381.4355212822.

The spelling of 55496220 in words is "fifty-five million, four hundred ninety-six thousand, two hundred twenty".