405136223 has 4 divisors (see below), whose sum is σ = 408326400. Its totient is φ = 401946048.

The previous prime is 405136217. The next prime is 405136243. The reversal of 405136223 is 322631504.

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 405136223 - 2⁸ = 405135967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 405136192 and 405136201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405136243) 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, 1594898 + ... + 1595151.

It is an arithmetic number, because the mean of its divisors is an integer number (102081600).

Almost surely, 2^405136223 is an apocalyptic number.

405136223 is a deficient number, since it is larger than the sum of its proper divisors (3190177).

405136223 is a wasteful number, since it uses less digits than its factorization.

405136223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190176.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 405136223 is about 20127.9960005958. The cubic root of 405136223 is about 739.9465648048.

Adding to 405136223 its reverse (322631504), we get a palindrome (727767727).

The spelling of 405136223 in words is "four hundred five million, one hundred thirty-six thousand, two hundred twenty-three".