55551006055021 has 32 divisors (see below), whose sum is σ = 59407761374208. Its totient is φ = 51822587646720.

The previous prime is 55551006055019. The next prime is 55551006055037. The reversal of 55551006055021 is 12055060015555.

It is a happy number.

It is not a de Polignac number, because 55551006055021 - 2¹ = 55551006055019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551006055921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434672151 + ... + 434799931.

It is an arithmetic number, because the mean of its divisors is an integer number (1856492542944).

Almost surely, 2^{55551006055021} is an apocalyptic number.

It is an amenable number.

55551006055021 is a deficient number, since it is larger than the sum of its proper divisors (3856755319187).

55551006055021 is a wasteful number, since it uses less digits than its factorization.

55551006055021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129261.

The product of its (nonzero) digits is 187500, while the sum is 40.

The spelling of 55551006055021 in words is "fifty-five trillion, five hundred fifty-one billion, six million, fifty-five thousand, twenty-one".