45219909 has 32 divisors (see below), whose sum is σ = 72382464. Its totient is φ = 24552000.

The previous prime is 45219907. The next prime is 45219913. The reversal of 45219909 is 90991254.

It is not a de Polignac number, because 45219909 - 2¹ = 45219907 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45219907) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121047 + ... + 121419.

It is an arithmetic number, because the mean of its divisors is an integer number (2261952).

Almost surely, 2^45219909 is an apocalyptic number.

It is an amenable number.

45219909 is a deficient number, since it is larger than the sum of its proper divisors (27162555).

45219909 is a wasteful number, since it uses less digits than its factorization.

45219909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 45219909 is about 6724.5750051583. The cubic root of 45219909 is about 356.2677912937.

The spelling of 45219909 in words is "forty-five million, two hundred nineteen thousand, nine hundred nine".