45221504 has 16 divisors (see below), whose sum is σ = 90089970. Its totient is φ = 22610688.

The previous prime is 45221503. The next prime is 45221507. The reversal of 45221504 is 40512254.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 34199104 + 11022400 = 5848^2 + 3320^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 45221504.

It is not an unprimeable number, because it can be changed into a prime (45221503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176519 + ... + 176774.

Almost surely, 2^45221504 is an apocalyptic number.

It is an amenable number.

45221504 is a deficient number, since it is larger than the sum of its proper divisors (44868466).

45221504 is an equidigital number, since it uses as much as digits as its factorization.

45221504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353307 (or 353295 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 45221504 is about 6724.6935989679. The cubic root of 45221504 is about 356.2719800125.

Adding to 45221504 its reverse (40512254), we get a palindrome (85733758).

The spelling of 45221504 in words is "forty-five million, two hundred twenty-one thousand, five hundred four".