40144525 has 12 divisors (see below), whose sum is σ = 50463412. Its totient is φ = 31674240.

The previous prime is 40144501. The next prime is 40144529. The reversal of 40144525 is 52544104.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 37636 + 40106889 = 194^2 + 6333^2 .

It is not a de Polignac number, because 40144525 - 2¹³ = 40136333 is a prime.

It is a super-2 number, since 2×40144525² = 3223165774951250, which contains 22 as substring.

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 40144525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144529) 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, 9174 + ... + 12823.

Almost surely, 2^40144525 is an apocalyptic number.

It is an amenable number.

40144525 is a deficient number, since it is larger than the sum of its proper divisors (10318887).

40144525 is a wasteful number, since it uses less digits than its factorization.

40144525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22080 (or 22075 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 40144525 is about 6335.9707227859. The cubic root of 40144525 is about 342.4065847143.

Adding to 40144525 its reverse (52544104), we get a palindrome (92688629).

The spelling of 40144525 in words is "forty million, one hundred forty-four thousand, five hundred twenty-five".