40253213 has 16 divisors (see below), whose sum is σ = 54047616. Its totient is φ = 28952640.

The previous prime is 40253209. The next prime is 40253231. The reversal of 40253213 is 31235204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40253213 - 2² = 40253209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40253233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19106 + ... + 21107.

It is an arithmetic number, because the mean of its divisors is an integer number (3377976).

Almost surely, 2^40253213 is an apocalyptic number.

It is an amenable number.

40253213 is a deficient number, since it is larger than the sum of its proper divisors (13794403).

40253213 is a wasteful number, since it uses less digits than its factorization.

40253213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40244.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40253213 is about 6344.5419850451. The cubic root of 40253213 is about 342.7153188140.

Adding to 40253213 its reverse (31235204), we get a palindrome (71488417).

Subtracting from 40253213 its reverse (31235204), we obtain a square (9018009 = 3003²).

The spelling of 40253213 in words is "forty million, two hundred fifty-three thousand, two hundred thirteen".