55216621201 has 16 divisors (see below), whose sum is σ = 63311174784. Its totient is φ = 47173837824.

The previous prime is 55216621193. The next prime is 55216621307. The reversal of 55216621201 is 10212661255.

55216621201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55216621201 - 2³ = 55216621193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55216624201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5287281 + ... + 5297713.

It is an arithmetic number, because the mean of its divisors is an integer number (3956948424).

Almost surely, 2^55216621201 is an apocalyptic number.

It is an amenable number.

55216621201 is a deficient number, since it is larger than the sum of its proper divisors (8094553583).

55216621201 is a wasteful number, since it uses less digits than its factorization.

55216621201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12840.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 55216621201 in words is "fifty-five billion, two hundred sixteen million, six hundred twenty-one thousand, two hundred one".