45145521 has 12 divisors (see below), whose sum is σ = 66598272. Its totient is φ = 29456376.

The previous prime is 45145493. The next prime is 45145537. The reversal of 45145521 is 12554154.

It is not a de Polignac number, because 45145521 - 2¹¹ = 45143473 is a prime.

It is a super-2 number, since 2×45145521² = 4076236132722882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45145921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52941 + ... + 53786.

It is an arithmetic number, because the mean of its divisors is an integer number (5549856).

Almost surely, 2^45145521 is an apocalyptic number.

It is an amenable number.

45145521 is a deficient number, since it is larger than the sum of its proper divisors (21452751).

45145521 is a wasteful number, since it uses less digits than its factorization.

45145521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106780 (or 106777 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 45145521 is about 6719.0416727388. The cubic root of 45145521 is about 356.0723272858.

Adding to 45145521 its reverse (12554154), we get a palindrome (57699675).

The spelling of 45145521 in words is "forty-five million, one hundred forty-five thousand, five hundred twenty-one".