405223013 has 16 divisors (see below), whose sum is σ = 470057280. Its totient is φ = 346114944.

The previous prime is 405222997. The next prime is 405223031. The reversal of 405223013 is 310322504.

It is a happy number.

It is not a de Polignac number, because 405223013 - 2⁴ = 405222997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405223043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8456 + ... + 29697.

It is an arithmetic number, because the mean of its divisors is an integer number (29378580).

Almost surely, 2^405223013 is an apocalyptic number.

405223013 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

405223013 is a deficient number, since it is larger than the sum of its proper divisors (64834267).

405223013 is a wasteful number, since it uses less digits than its factorization.

405223013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38228.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 405223013 is about 20130.1518374800. The cubic root of 405223013 is about 739.9993991960. Note that the first 3 decimals are identical.

Adding to 405223013 its reverse (310322504), we get a palindrome (715545517).

The spelling of 405223013 in words is "four hundred five million, two hundred twenty-three thousand, thirteen".