55221342506 has 8 divisors (see below), whose sum is σ = 90362196864. Its totient is φ = 25100610220.

The previous prime is 55221342497. The next prime is 55221342521. The reversal of 55221342506 is 60524312255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×55221342506³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255030490 + ... + 1255030533.

It is an arithmetic number, because the mean of its divisors is an integer number (11295274608).

Almost surely, 2^55221342506 is an apocalyptic number.

55221342506 is a deficient number, since it is larger than the sum of its proper divisors (35140854358).

55221342506 is a wasteful number, since it uses less digits than its factorization.

55221342506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510061036.

The product of its (nonzero) digits is 72000, while the sum is 35.

The spelling of 55221342506 in words is "fifty-five billion, two hundred twenty-one million, three hundred forty-two thousand, five hundred six".