45552509 has 4 divisors (see below), whose sum is σ = 45578304. Its totient is φ = 45526716.

The previous prime is 45552449. The next prime is 45552539. The reversal of 45552509 is 90525554.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45552509 - 2²⁴ = 28775293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45552539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10037 + ... + 13850.

It is an arithmetic number, because the mean of its divisors is an integer number (11394576).

Almost surely, 2^45552509 is an apocalyptic number.

It is an amenable number.

45552509 is a deficient number, since it is larger than the sum of its proper divisors (25795).

45552509 is a wasteful number, since it uses less digits than its factorization.

45552509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25794.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 45552509 is about 6749.2598853504. The cubic root of 45552509 is about 357.1391282430.

The spelling of 45552509 in words is "forty-five million, five hundred fifty-two thousand, five hundred nine".