40144253 has 4 divisors (see below), whose sum is σ = 40173888. Its totient is φ = 40114620.

The previous prime is 40144229. The next prime is 40144301. The reversal of 40144253 is 35244104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40144253 - 2²⁰ = 39095677 is a prime.

It is a super-2 number, since 2×40144253² = 3223122097856018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12683 + ... + 15528.

It is an arithmetic number, because the mean of its divisors is an integer number (10043472).

Almost surely, 2^40144253 is an apocalyptic number.

It is an amenable number.

40144253 is a deficient number, since it is larger than the sum of its proper divisors (29635).

40144253 is a wasteful number, since it uses less digits than its factorization.

40144253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29634.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40144253 is about 6335.9492580039. The cubic root of 40144253 is about 342.4058113851.

Adding to 40144253 its reverse (35244104), we get a palindrome (75388357).

The spelling of 40144253 in words is "forty million, one hundred forty-four thousand, two hundred fifty-three".