45221540 has 48 divisors (see below), whose sum is σ = 116884992. Its totient is φ = 14311296.

The previous prime is 45221537. The next prime is 45221549. The reversal of 45221540 is 4512254.

45221540 = T₄₅₅ + T₄₅₆ + ... + T₇₁₄.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (45221549) 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, 10604 + ... + 14243.

It is an arithmetic number, because the mean of its divisors is an integer number (2435104).

Almost surely, 2^45221540 is an apocalyptic number.

It is an amenable number.

45221540 is an abundant number, since it is smaller than the sum of its proper divisors (71663452).

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

45221540 is a wasteful number, since it uses less digits than its factorization.

45221540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24876 (or 24874 counting only the distinct ones).

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

The square root of 45221540 is about 6724.6962756693. The cubic root of 45221540 is about 356.2720745529.

Adding to 45221540 its reverse (4512254), we get a palindrome (49733794).

The spelling of 45221540 in words is "forty-five million, two hundred twenty-one thousand, five hundred forty".