45257219 has 4 divisors (see below), whose sum is σ = 51722544. Its totient is φ = 38791896.

The previous prime is 45257207. The next prime is 45257237. The reversal of 45257219 is 91275254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45257219 - 2⁴ = 45257203 is a prime.

It is a super-2 number, since 2×45257219² = 4096431743227922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45257249) 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, 3232652 + ... + 3232665.

It is an arithmetic number, because the mean of its divisors is an integer number (12930636).

Almost surely, 2^45257219 is an apocalyptic number.

45257219 is a deficient number, since it is larger than the sum of its proper divisors (6465325).

45257219 is an equidigital number, since it uses as much as digits as its factorization.

45257219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465324.

The product of its digits is 25200, while the sum is 35.

The square root of 45257219 is about 6727.3485861816. The cubic root of 45257219 is about 356.3657473895.

The spelling of 45257219 in words is "forty-five million, two hundred fifty-seven thousand, two hundred nineteen".