40215423 has 8 divisors (see below), whose sum is σ = 54141568. Its totient is φ = 26549784.

The previous prime is 40215397. The next prime is 40215433. The reversal of 40215423 is 32451204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40215423 - 2¹⁶ = 40149887 is a prime.

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 40215423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40215433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64765 + ... + 65382.

It is an arithmetic number, because the mean of its divisors is an integer number (6767696).

Almost surely, 2^40215423 is an apocalyptic number.

40215423 is a deficient number, since it is larger than the sum of its proper divisors (13926145).

40215423 is a wasteful number, since it uses less digits than its factorization.

40215423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130253.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 40215423 is about 6341.5631353792. The cubic root of 40215423 is about 342.6080373827.

Adding to 40215423 its reverse (32451204), we get a palindrome (72666627).

The spelling of 40215423 in words is "forty million, two hundred fifteen thousand, four hundred twenty-three".