55721343151 has 4 divisors (see below), whose sum is σ = 55724464152. Its totient is φ = 55718222152.

The previous prime is 55721343143. The next prime is 55721343169. The reversal of 55721343151 is 15134312755.

55721343151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55721343151 - 2³ = 55721343143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55721343151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55721343131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1533565 + ... + 1569478.

It is an arithmetic number, because the mean of its divisors is an integer number (13931116038).

Almost surely, 2^55721343151 is an apocalyptic number.

55721343151 is a deficient number, since it is larger than the sum of its proper divisors (3121001).

55721343151 is a wasteful number, since it uses less digits than its factorization.

55721343151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121000.

The product of its digits is 63000, while the sum is 37.

The spelling of 55721343151 in words is "fifty-five billion, seven hundred twenty-one million, three hundred forty-three thousand, one hundred fifty-one".