55148225621 has 4 divisors (see below), whose sum is σ = 55151083500. Its totient is φ = 55145367744.

The previous prime is 55148225617. The next prime is 55148225623. The reversal of 55148225621 is 12652284155.

55148225621 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 can be written as a sum of positive squares in 2 ways, for example, as 4954752100 + 50193473521 = 70390^2 + 224039^2 .

It is a cyclic number.

It is not a de Polignac number, because 55148225621 - 2² = 55148225617 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 (55148225623) 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, 1399796 + ... + 1438653.

It is an arithmetic number, because the mean of its divisors is an integer number (13787770875).

Almost surely, 2^55148225621 is an apocalyptic number.

It is an amenable number.

55148225621 is a deficient number, since it is larger than the sum of its proper divisors (2857879).

55148225621 is a wasteful number, since it uses less digits than its factorization.

55148225621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857878.

The product of its digits is 192000, while the sum is 41.

The spelling of 55148225621 in words is "fifty-five billion, one hundred forty-eight million, two hundred twenty-five thousand, six hundred twenty-one".