40504213 has 4 divisors (see below), whose sum is σ = 41900940. Its totient is φ = 39107488.

The previous prime is 40504207. The next prime is 40504223. The reversal of 40504213 is 31240504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33837489 + 6666724 = 5817^2 + 2582^2 .

It is a cyclic number.

It is not a de Polignac number, because 40504213 - 2¹³ = 40496021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40504223) 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, 698320 + ... + 698377.

It is an arithmetic number, because the mean of its divisors is an integer number (10475235).

Almost surely, 2^40504213 is an apocalyptic number.

It is an amenable number.

40504213 is a deficient number, since it is larger than the sum of its proper divisors (1396727).

40504213 is a wasteful number, since it uses less digits than its factorization.

40504213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396726.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40504213 is about 6364.2920266122. The cubic root of 40504213 is about 343.4261802077.

Adding to 40504213 its reverse (31240504), we get a palindrome (71744717).

The spelling of 40504213 in words is "forty million, five hundred four thousand, two hundred thirteen".