40642231 has 4 divisors (see below), whose sum is σ = 46448272. Its totient is φ = 34836192.

The previous prime is 40642229. The next prime is 40642247. The reversal of 40642231 is 13224604.

It is a happy number.

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 40642231 - 2¹ = 40642229 is a prime.

It is a super-2 number, since 2×40642231² = 3303581881314722, 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 (40642201) 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, 2903010 + ... + 2903023.

It is an arithmetic number, because the mean of its divisors is an integer number (11612068).

Almost surely, 2^40642231 is an apocalyptic number.

40642231 is a deficient number, since it is larger than the sum of its proper divisors (5806041).

40642231 is an equidigital number, since it uses as much as digits as its factorization.

40642231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5806040.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 40642231 is about 6375.1259595399. The cubic root of 40642231 is about 343.8158125891.

Adding to 40642231 its reverse (13224604), we get a palindrome (53866835).

The spelling of 40642231 in words is "forty million, six hundred forty-two thousand, two hundred thirty-one".