40651225 has 12 divisors (see below), whose sum is σ = 50733484. Its totient is φ = 32310720.

The previous prime is 40651183. The next prime is 40651229. The reversal of 40651225 is 52215604.

40651225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 2471184 + 38180041 = 1572^2 + 6179^2 .

It is not a de Polignac number, because 40651225 - 2⁹ = 40650713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40651225.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40651229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254 + ... + 9103.

Almost surely, 2^40651225 is an apocalyptic number.

It is an amenable number.

40651225 is a deficient number, since it is larger than the sum of its proper divisors (10082259).

40651225 is a wasteful number, since it uses less digits than its factorization.

40651225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524 (or 10519 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40651225 is about 6375.8313183459. The cubic root of 40651225 is about 343.8411725105.

Adding to 40651225 its reverse (52215604), we get a palindrome (92866829).

The spelling of 40651225 in words is "forty million, six hundred fifty-one thousand, two hundred twenty-five".