40135225 has 12 divisors (see below), whose sum is σ = 53596396. Its totient is φ = 29638080.

The previous prime is 40135223. The next prime is 40135229. The reversal of 40135225 is 52253104.

It can be written as a sum of positive squares in 6 ways, for example, as 8415801 + 31719424 = 2901^2 + 5632^2 .

It is not a de Polignac number, because 40135225 - 2¹ = 40135223 is a prime.

It is a super-2 number, since 2×40135225² = 3221672571601250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40135196 and 40135205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40135223) 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, 61422 + ... + 62071.

Almost surely, 2^40135225 is an apocalyptic number.

It is an amenable number.

40135225 is a deficient number, since it is larger than the sum of its proper divisors (13461171).

40135225 is a wasteful number, since it uses less digits than its factorization.

40135225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123516 (or 123511 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 40135225 is about 6335.2367753700. The cubic root of 40135225 is about 342.3801416965.

Adding to 40135225 its reverse (52253104), we get a palindrome (92388329).

The spelling of 40135225 in words is "forty million, one hundred thirty-five thousand, two hundred twenty-five".