40451223 has 4 divisors (see below), whose sum is σ = 53934968. Its totient is φ = 26967480.

The previous prime is 40451219. The next prime is 40451233. The reversal of 40451223 is 32215404.

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

It is not a de Polignac number, because 40451223 - 2² = 40451219 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 40451223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40451233) 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, 6741868 + ... + 6741873.

It is an arithmetic number, because the mean of its divisors is an integer number (13483742).

Almost surely, 2^40451223 is an apocalyptic number.

40451223 is a deficient number, since it is larger than the sum of its proper divisors (13483745).

40451223 is a wasteful number, since it uses less digits than its factorization.

40451223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13483744.

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

The square root of 40451223 is about 6360.1275930597. The cubic root of 40451223 is about 343.2763513901.

Adding to 40451223 its reverse (32215404), we get a palindrome (72666627).

The spelling of 40451223 in words is "forty million, four hundred fifty-one thousand, two hundred twenty-three".