40213225 has 12 divisors (see below), whose sum is σ = 53700556. Its totient is φ = 29695680.

The previous prime is 40213219. The next prime is 40213249. The reversal of 40213225 is 52231204.

It can be written as a sum of positive squares in 6 ways, for example, as 1125721 + 39087504 = 1061^2 + 6252^2 .

It is not a de Polignac number, because 40213225 - 2⁹ = 40212713 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61542 + ... + 62191.

Almost surely, 2^40213225 is an apocalyptic number.

It is an amenable number.

40213225 is a deficient number, since it is larger than the sum of its proper divisors (13487331).

40213225 is a wasteful number, since it uses less digits than its factorization.

40213225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123756 (or 123751 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40213225 is about 6341.3898318902. The cubic root of 40213225 is about 342.6017954476.

Adding to 40213225 its reverse (52231204), we get a palindrome (92444429).

The spelling of 40213225 in words is "forty million, two hundred thirteen thousand, two hundred twenty-five".