40013225 has 12 divisors (see below), whose sum is σ = 56704704. Its totient is φ = 27437520.

The previous prime is 40013201. The next prime is 40013227. The reversal of 40013225 is 52231004.

It is not a de Polignac number, because 40013225 - 2⁸ = 40012969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40013227) 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, 114149 + ... + 114498.

It is an arithmetic number, because the mean of its divisors is an integer number (4725392).

Almost surely, 2^40013225 is an apocalyptic number.

It is an amenable number.

40013225 is a deficient number, since it is larger than the sum of its proper divisors (16691479).

40013225 is a wasteful number, since it uses less digits than its factorization.

40013225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228664 (or 228659 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40013225 is about 6325.6007619830. The cubic root of 40013225 is about 342.0328759021.

Adding to 40013225 its reverse (52231004), we get a palindrome (92244229).

It can be divided in two parts, 400 and 13225, that multiplied together give a square (5290000 = 2300²).

The spelling of 40013225 in words is "forty million, thirteen thousand, two hundred twenty-five".