40143225 has 12 divisors (see below), whose sum is σ = 66370256. Its totient is φ = 21409680.

The previous prime is 40143197. The next prime is 40143227. The reversal of 40143225 is 52234104.

It is not a de Polignac number, because 40143225 - 2⁵ = 40143193 is a prime.

It is a super-2 number, since 2×40143225² = 3222957026801250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40143227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267547 + ... + 267696.

Almost surely, 2^40143225 is an apocalyptic number.

It is an amenable number.

40143225 is a deficient number, since it is larger than the sum of its proper divisors (26227031).

40143225 is a wasteful number, since it uses less digits than its factorization.

40143225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535256 (or 535251 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40143225 is about 6335.8681330975. The cubic root of 40143225 is about 342.4028886240.

Adding to 40143225 its reverse (52234104), we get a palindrome (92377329).

The spelling of 40143225 in words is "forty million, one hundred forty-three thousand, two hundred twenty-five".