40022431 has 4 divisors (see below), whose sum is σ = 40246200. Its totient is φ = 39798664.

The previous prime is 40022429. The next prime is 40022441. The reversal of 40022431 is 13422004.

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

It is a cyclic number.

It is not a de Polignac number, because 40022431 - 2¹ = 40022429 is a prime.

It is a super-2 number, since 2×40022431² = 3203589966299522, 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 (40022441) 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, 111616 + ... + 111973.

It is an arithmetic number, because the mean of its divisors is an integer number (10061550).

Almost surely, 2^40022431 is an apocalyptic number.

40022431 is a deficient number, since it is larger than the sum of its proper divisors (223769).

40022431 is a wasteful number, since it uses less digits than its factorization.

40022431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223768.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40022431 is about 6326.3283980521. The cubic root of 40022431 is about 342.0591048402.

Adding to 40022431 its reverse (13422004), we get a palindrome (53444435).

The spelling of 40022431 in words is "forty million, twenty-two thousand, four hundred thirty-one".