40818125 has 10 divisors (see below), whose sum is σ = 51007110. Its totient is φ = 32654000.

The previous prime is 40818121. The next prime is 40818131. The reversal of 40818125 is 52181804.

It can be written as a sum of positive squares in 5 ways, for example, as 9132484 + 31685641 = 3022^2 + 5629^2 .

It is not a de Polignac number, because 40818125 - 2² = 40818121 is a prime.

It is a super-2 number, since 2×40818125² = 3332238657031250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40818121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 32030 + ... + 33279.

It is an arithmetic number, because the mean of its divisors is an integer number (5100711).

Almost surely, 2^40818125 is an apocalyptic number.

It is an amenable number.

40818125 is a deficient number, since it is larger than the sum of its proper divisors (10188985).

40818125 is an frugal number, since it uses more digits than its factorization.

40818125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65329 (or 65314 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 40818125 is about 6388.9064009422. The cubic root of 40818125 is about 344.3110946600.

Adding to 40818125 its reverse (52181804), we get a palindrome (92999929).

The spelling of 40818125 in words is "forty million, eight hundred eighteen thousand, one hundred twenty-five".