813402322 has 4 divisors (see below), whose sum is σ = 1220103486. Its totient is φ = 406701160.

The previous prime is 813402299. The next prime is 813402329. The reversal of 813402322 is 223204318.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 223204318 = 2 ⋅111602159.

It can be written as a sum of positive squares in only one way, i.e., 562211521 + 251190801 = 23711^2 + 15849^2 .

It is not an unprimeable number, because it can be changed into a prime (813402329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203350579 + ... + 203350582.

Almost surely, 2^813402322 is an apocalyptic number.

813402322 is a deficient number, since it is larger than the sum of its proper divisors (406701164).

813402322 is a wasteful number, since it uses less digits than its factorization.

813402322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406701163.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 813402322 is about 28520.2090104543. The cubic root of 813402322 is about 933.4730898146.

The spelling of 813402322 in words is "eight hundred thirteen million, four hundred two thousand, three hundred twenty-two".