40372231 has 4 divisors (see below), whose sum is σ = 40595464. Its totient is φ = 40149000.

The previous prime is 40372223. The next prime is 40372237. The reversal of 40372231 is 13227304.

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 40372231 - 2³ = 40372223 is a prime.

It is a super-2 number, since 2×40372231² = 3259834071834722, 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 (40372237) 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, 111345 + ... + 111706.

It is an arithmetic number, because the mean of its divisors is an integer number (10148866).

Almost surely, 2^40372231 is an apocalyptic number.

40372231 is a deficient number, since it is larger than the sum of its proper divisors (223233).

40372231 is a wasteful number, since it uses less digits than its factorization.

40372231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223232.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 40372231 is about 6353.9146201377. The cubic root of 40372231 is about 343.0527590137.

Adding to 40372231 its reverse (13227304), we get a palindrome (53599535).

The spelling of 40372231 in words is "forty million, three hundred seventy-two thousand, two hundred thirty-one".