55222343550 has 144 divisors (see below), whose sum is σ = 171372616272. Its totient is φ = 12599731200.

The previous prime is 55222343537. The next prime is 55222343563. The reversal of 55222343550 is 5534322255.

55222343550 is a `hidden beast` number, since 5 + 52 + 22 + 34 + 3 + 550 = 666.

It is an interprime number because it is at equal distance from previous prime (55222343537) and next prime (55222343563).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 243969 + ... + 412268.

It is an arithmetic number, because the mean of its divisors is an integer number (1190087613).

Almost surely, 2^55222343550 is an apocalyptic number.

55222343550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55222343550 is an abundant number, since it is smaller than the sum of its proper divisors (116150272722).

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

55222343550 is a wasteful number, since it uses less digits than its factorization.

55222343550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656283 (or 656275 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

The spelling of 55222343550 in words is "fifty-five billion, two hundred twenty-two million, three hundred forty-three thousand, five hundred fifty".