405418223 has 4 divisors (see below), whose sum is σ = 463335120. Its totient is φ = 347501328.

The previous prime is 405418207. The next prime is 405418259. The reversal of 405418223 is 322814504.

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 405418223 - 2⁴ = 405418207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405438223) 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, 28958438 + ... + 28958451.

It is an arithmetic number, because the mean of its divisors is an integer number (115833780).

Almost surely, 2^405418223 is an apocalyptic number.

405418223 is a deficient number, since it is larger than the sum of its proper divisors (57916897).

405418223 is an equidigital number, since it uses as much as digits as its factorization.

405418223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57916896.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 405418223 is about 20134.9999503352. Note that the first 4 decimals coincide. The cubic root of 405418223 is about 740.1182079243.

The spelling of 405418223 in words is "four hundred five million, four hundred eighteen thousand, two hundred twenty-three".