813220942 has 16 divisors (see below), whose sum is σ = 1310867280. Its totient is φ = 376979328.

The previous prime is 813220939. The next prime is 813220973. The reversal of 813220942 is 249022318.

It is a super-2 number, since 2×813220942² = 1322656601014734728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176217 + ... + 180772.

It is an arithmetic number, because the mean of its divisors is an integer number (81929205).

Almost surely, 2^813220942 is an apocalyptic number.

813220942 is a deficient number, since it is larger than the sum of its proper divisors (497646338).

813220942 is a wasteful number, since it uses less digits than its factorization.

813220942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357075.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 813220942 is about 28517.0289826973. The cubic root of 813220942 is about 933.4036998251.

The spelling of 813220942 in words is "eight hundred thirteen million, two hundred twenty thousand, nine hundred forty-two".