43921225 has 18 divisors (see below), whose sum is σ = 56432090. Its totient is φ = 33909120.

The previous prime is 43921201. The next prime is 43921261. The reversal of 43921225 is 52212934.

It can be written as a sum of positive squares in 9 ways, for example, as 3674889 + 40246336 = 1917^2 + 6344^2 .

It is not a de Polignac number, because 43921225 - 2⁹ = 43920713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43921193 and 43921202.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19981 + ... + 22069.

Almost surely, 2^43921225 is an apocalyptic number.

It is an amenable number.

43921225 is a deficient number, since it is larger than the sum of its proper divisors (12510865).

43921225 is a wasteful number, since it uses less digits than its factorization.

43921225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157 (or 2123 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 43921225 is about 6627.3090315753. The cubic root of 43921225 is about 352.8240234403.

The spelling of 43921225 in words is "forty-three million, nine hundred twenty-one thousand, two hundred twenty-five".