40171223 has 4 divisors (see below), whose sum is σ = 40205088. Its totient is φ = 40137360.

The previous prime is 40171217. The next prime is 40171237. The reversal of 40171223 is 32217104.

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 40171223 - 2⁸ = 40170967 is a prime.

It is a super-2 number, since 2×40171223² = 3227454314631458, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40171195 and 40171204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40171273) 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, 15086 + ... + 17547.

It is an arithmetic number, because the mean of its divisors is an integer number (10051272).

Almost surely, 2^40171223 is an apocalyptic number.

40171223 is a deficient number, since it is larger than the sum of its proper divisors (33865).

40171223 is a wasteful number, since it uses less digits than its factorization.

40171223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33864.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 40171223 is about 6338.0772320949. The cubic root of 40171223 is about 342.4824733959.

Adding to 40171223 its reverse (32217104), we get a palindrome (72388327).

The spelling of 40171223 in words is "forty million, one hundred seventy-one thousand, two hundred twenty-three".