40221625 has 16 divisors (see below), whose sum is σ = 50448528. Its totient is φ = 32016000.

The previous prime is 40221607. The next prime is 40221659. The reversal of 40221625 is 52612204.

It can be written as a sum of positive squares in 8 ways, for example, as 20187049 + 20034576 = 4493^2 + 4476^2 .

It is not a de Polignac number, because 40221625 - 2⁵ = 40221593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40221596 and 40221605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28435 + ... + 29815.

It is an arithmetic number, because the mean of its divisors is an integer number (3153033).

Almost surely, 2^40221625 is an apocalyptic number.

It is an amenable number.

40221625 is a deficient number, since it is larger than the sum of its proper divisors (10226903).

40221625 is a wasteful number, since it uses less digits than its factorization.

40221625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 40221625 is about 6342.0521126840. The cubic root of 40221625 is about 342.6256487506.

Adding to 40221625 its reverse (52612204), we get a palindrome (92833829).

The spelling of 40221625 in words is "forty million, two hundred twenty-one thousand, six hundred twenty-five".