45115540 has 24 divisors (see below), whose sum is σ = 97800192. Its totient is φ = 17463840.

The previous prime is 45115513. The next prime is 45115559. The reversal of 45115540 is 4551154.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35764 + ... + 37003.

It is an arithmetic number, because the mean of its divisors is an integer number (4075008).

Almost surely, 2^45115540 is an apocalyptic number.

It is an amenable number.

45115540 is an abundant number, since it is smaller than the sum of its proper divisors (52684652).

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

45115540 is a wasteful number, since it uses less digits than its factorization.

45115540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72807 (or 72805 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 45115540 is about 6716.8102548754. The cubic root of 45115540 is about 355.9934876560.

Adding to 45115540 its reverse (4551154), we get a palindrome (49666694).

The spelling of 45115540 in words is "forty-five million, one hundred fifteen thousand, five hundred forty".