45551421225 has 120 divisors (see below), whose sum is σ = 89923173120. Its totient is φ = 22742311680.

The previous prime is 45551421163. The next prime is 45551421229. The reversal of 45551421225 is 52212415554.

45551421225 is a `hidden beast` number, since 4 + 5 + 5 + 5 + 1 + 421 + 225 = 666.

It is not a de Polignac number, because 45551421225 - 2⁹ = 45551420713 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 45551421225.

It is not an unprimeable number, because it can be changed into a prime (45551421229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2178621 + ... + 2199429.

It is an arithmetic number, because the mean of its divisors is an integer number (749359776).

Almost surely, 2^45551421225 is an apocalyptic number.

45551421225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

45551421225 is a deficient number, since it is larger than the sum of its proper divisors (44371751895).

45551421225 is a wasteful number, since it uses less digits than its factorization.

45551421225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20901 (or 20887 counting only the distinct ones).

The product of its digits is 80000, while the sum is 36.

Adding to 45551421225 its reverse (52212415554), we get a palindrome (97763836779).

The spelling of 45551421225 in words is "forty-five billion, five hundred fifty-one million, four hundred twenty-one thousand, two hundred twenty-five".