45319945 has 24 divisors (see below), whose sum is σ = 60261768. Its totient is φ = 32693760.

The previous prime is 45319927. The next prime is 45319987. The reversal of 45319945 is 54991354.

It can be written as a sum of positive squares in 4 ways, for example, as 5035536 + 40284409 = 2244^2 + 6347^2 .

It is not a de Polignac number, because 45319945 - 2¹¹ = 45317897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45319898 and 45319907.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104449 + ... + 104881.

It is an arithmetic number, because the mean of its divisors is an integer number (2510907).

Almost surely, 2^45319945 is an apocalyptic number.

It is an amenable number.

45319945 is a deficient number, since it is larger than the sum of its proper divisors (14941823).

45319945 is a wasteful number, since it uses less digits than its factorization.

45319945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 622 counting only the distinct ones).

The product of its digits is 97200, while the sum is 40.

The square root of 45319945 is about 6732.0089869221. The cubic root of 45319945 is about 356.5303110335.

It can be divided in two parts, 45319 and 945, that added together give a palindrome (46264).

The spelling of 45319945 in words is "forty-five million, three hundred nineteen thousand, nine hundred forty-five".