814225621 has 8 divisors (see below), whose sum is σ = 902808288. Its totient is φ = 728070000.

The previous prime is 814225613. The next prime is 814225631. The reversal of 814225621 is 126522418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 814225621 - 2³ = 814225613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (814225631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 606055 + ... + 607396.

It is an arithmetic number, because the mean of its divisors is an integer number (112851036).

Almost surely, 2^814225621 is an apocalyptic number.

It is an amenable number.

814225621 is a deficient number, since it is larger than the sum of its proper divisors (88582667).

814225621 is a wasteful number, since it uses less digits than its factorization.

814225621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213523.

The product of its digits is 7680, while the sum is 31.

The square root of 814225621 is about 28534.6389674024. The cubic root of 814225621 is about 933.7879271727.

The spelling of 814225621 in words is "eight hundred fourteen million, two hundred twenty-five thousand, six hundred twenty-one".