55221840355 has 32 divisors (see below), whose sum is σ = 74115191808. Its totient is φ = 39149203200.

The previous prime is 55221840343. The next prime is 55221840371. The reversal of 55221840355 is 55304812255.

It is not a de Polignac number, because 55221840355 - 2²³ = 55213451747 is a prime.

It is a Duffinian 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, 2883622 + ... + 2902708.

It is an arithmetic number, because the mean of its divisors is an integer number (2316099744).

Almost surely, 2^55221840355 is an apocalyptic number.

55221840355 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55221840355 is a deficient number, since it is larger than the sum of its proper divisors (18893351453).

55221840355 is a wasteful number, since it uses less digits than its factorization.

55221840355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20427.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 55221840355 in words is "fifty-five billion, two hundred twenty-one million, eight hundred forty thousand, three hundred fifty-five".