5451221545 has 16 divisors (see below), whose sum is σ = 8155594368. Its totient is φ = 3398163840.

The previous prime is 5451221537. The next prime is 5451221549.

5451221545 is nontrivially palindromic in base 10.

5451221545 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 5451221545 - 2³ = 5451221537 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 5451221545.

It is not an unprimeable number, because it can be changed into a prime (5451221549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7079124 + ... + 7079893.

It is an arithmetic number, because the mean of its divisors is an integer number (509724648).

Almost surely, 2^5451221545 is an apocalyptic number.

5451221545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5451221545 is a deficient number, since it is larger than the sum of its proper divisors (2704372823).

5451221545 is a wasteful number, since it uses less digits than its factorization.

5451221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14159040.

The product of its digits is 40000, while the sum is 34.

The square root of 5451221545 is about 73832.3881843192. The cubic root of 5451221545 is about 1759.9403329677.

The spelling of 5451221545 in words is "five billion, four hundred fifty-one million, two hundred twenty-one thousand, five hundred forty-five".