821146422 has 8 divisors (see below), whose sum is σ = 1642292856. Its totient is φ = 273715472.

The previous prime is 821146409. The next prime is 821146457. The reversal of 821146422 is 224641128.

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

821146422 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 821146422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68428863 + ... + 68428874.

It is an arithmetic number, because the mean of its divisors is an integer number (205286607).

Almost surely, 2^821146422 is an apocalyptic number.

821146422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821146422 is a wasteful number, since it uses less digits than its factorization.

821146422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136857742.

The product of its digits is 6144, while the sum is 30.

The square root of 821146422 is about 28655.6525313942. The cubic root of 821146422 is about 936.4261541996.

The spelling of 821146422 in words is "eight hundred twenty-one million, one hundred forty-six thousand, four hundred twenty-two".