545221100551 has 4 divisors (see below), whose sum is σ = 545223768400. Its totient is φ = 545218432704.

The previous prime is 545221100519. The next prime is 545221100561. The reversal of 545221100551 is 155001122545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155001122545 = 5 ⋅31000224509.

It is a cyclic number.

It is not a de Polignac number, because 545221100551 - 2⁵ = 545221100519 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 (545221100561) 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, 999411 + ... + 1445428.

It is an arithmetic number, because the mean of its divisors is an integer number (136305942100).

Almost surely, 2^545221100551 is an apocalyptic number.

545221100551 is a deficient number, since it is larger than the sum of its proper divisors (2667849).

545221100551 is a wasteful number, since it uses less digits than its factorization.

545221100551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2667848.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 545221100551 in words is "five hundred forty-five billion, two hundred twenty-one million, one hundred thousand, five hundred fifty-one".