55221614450 has 54 divisors (see below), whose sum is σ = 103852789101. Its totient is φ = 21846044880.

The previous prime is 55221614447. The next prime is 55221614473. The reversal of 55221614450 is 5441612255.

It can be written as a sum of positive squares in 2 ways, for example, as 54117182161 + 1104432289 = 232631^2 + 33233^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=166165.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55221614450.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 277495451 + ... + 277495649.

Almost surely, 2^55221614450 is an apocalyptic number.

55221614450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55221614450 is a deficient number, since it is larger than the sum of its proper divisors (48631174651).

55221614450 is an equidigital number, since it uses as much as digits as its factorization.

55221614450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 55221614450 in words is "fifty-five billion, two hundred twenty-one million, six hundred fourteen thousand, four hundred fifty".