45221490 has 40 divisors (see below), whose sum is σ = 121597740. Its totient is φ = 12058848.

The previous prime is 45221489. The next prime is 45221503. The reversal of 45221490 is 9412254.

It can be written as a sum of positive squares in 2 ways, for example, as 44715969 + 505521 = 6687^2 + 711^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27105 + ... + 28724.

Almost surely, 2^45221490 is an apocalyptic number.

45221490 is an abundant number, since it is smaller than the sum of its proper divisors (76376250).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45221490 is a wasteful number, since it uses less digits than its factorization.

45221490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55848 (or 55839 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 45221490 is about 6724.6925580282. The cubic root of 45221490 is about 356.2719432467.

The spelling of 45221490 in words is "forty-five million, two hundred twenty-one thousand, four hundred ninety".