55220201615 has 4 divisors (see below), whose sum is σ = 66264241944. Its totient is φ = 44176161288.

The previous prime is 55220201611. The next prime is 55220201623. The reversal of 55220201615 is 51610202255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55220201615 - 2² = 55220201611 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 (55220201611) by changing a digit.

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, 5522020157 + ... + 5522020166.

It is an arithmetic number, because the mean of its divisors is an integer number (16566060486).

Almost surely, 2^55220201615 is an apocalyptic number.

55220201615 is a deficient number, since it is larger than the sum of its proper divisors (11044040329).

55220201615 is a wasteful number, since it uses less digits than its factorization.

55220201615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044040328.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 55220201615 in words is "fifty-five billion, two hundred twenty million, two hundred one thousand, six hundred fifteen".