55171522621 has 8 divisors (see below), whose sum is σ = 56704147200. Its totient is φ = 53641082448.

The previous prime is 55171522607. The next prime is 55171522639. The reversal of 55171522621 is 12622517155.

55171522621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55171522621 - 2¹⁵ = 55171489853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55171523621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 494821 + ... + 595978.

It is an arithmetic number, because the mean of its divisors is an integer number (7088018400).

Almost surely, 2^55171522621 is an apocalyptic number.

It is an amenable number.

55171522621 is a deficient number, since it is larger than the sum of its proper divisors (1532624579).

55171522621 is a wasteful number, since it uses less digits than its factorization.

55171522621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092203.

The product of its digits is 42000, while the sum is 37.

The spelling of 55171522621 in words is "fifty-five billion, one hundred seventy-one million, five hundred twenty-two thousand, six hundred twenty-one".