814221172 has 12 divisors (see below), whose sum is σ = 1425091360. Its totient is φ = 407052216.

The previous prime is 814221127. The next prime is 814221203. The reversal of 814221172 is 271122418.

It is a super-2 number, since 2×814221172² = 1325912233866107168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 814221172.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37279 + ... + 54937.

Almost surely, 2^814221172 is an apocalyptic number.

It is an amenable number.

814221172 is a deficient number, since it is larger than the sum of its proper divisors (610870188).

814221172 is a wasteful number, since it uses less digits than its factorization.

814221172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29190 (or 29188 counting only the distinct ones).

The product of its digits is 1792, while the sum is 28.

The square root of 814221172 is about 28534.5610094145. The cubic root of 814221172 is about 933.7862264033.

The spelling of 814221172 in words is "eight hundred fourteen million, two hundred twenty-one thousand, one hundred seventy-two".