45215389 has 4 divisors (see below), whose sum is σ = 45228960. Its totient is φ = 45201820.

The previous prime is 45215353. The next prime is 45215399. The reversal of 45215389 is 98351254.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45215389 - 2⁹ = 45214877 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 (45215399) 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, 2034 + ... + 9724.

It is an arithmetic number, because the mean of its divisors is an integer number (11307240).

Almost surely, 2^45215389 is an apocalyptic number.

It is an amenable number.

45215389 is a deficient number, since it is larger than the sum of its proper divisors (13571).

45215389 is an equidigital number, since it uses as much as digits as its factorization.

45215389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13570.

The product of its digits is 43200, while the sum is 37.

The square root of 45215389 is about 6724.2389160410. The cubic root of 45215389 is about 356.2559205336.

The spelling of 45215389 in words is "forty-five million, two hundred fifteen thousand, three hundred eighty-nine".