402312223 has 4 divisors (see below), whose sum is σ = 404219128. Its totient is φ = 400405320.

The previous prime is 402312221. The next prime is 402312233. The reversal of 402312223 is 322213204.

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 402312223 - 2¹ = 402312221 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 402312223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402312221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 953136 + ... + 953557.

It is an arithmetic number, because the mean of its divisors is an integer number (101054782).

Almost surely, 2^402312223 is an apocalyptic number.

402312223 is a deficient number, since it is larger than the sum of its proper divisors (1906905).

402312223 is a wasteful number, since it uses less digits than its factorization.

402312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906904.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 402312223 is about 20057.7222784642. The cubic root of 402312223 is about 738.2232899548.

Adding to 402312223 its reverse (322213204), we get a palindrome (724525427).

The spelling of 402312223 in words is "four hundred two million, three hundred twelve thousand, two hundred twenty-three".