10221378 has 8 divisors (see below), whose sum is σ = 20442768. Its totient is φ = 3407124.

The previous prime is 10221377. The next prime is 10221391. The reversal of 10221378 is 87312201.

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

10221378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (10221371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851776 + ... + 851787.

It is an arithmetic number, because the mean of its divisors is an integer number (2555346).

Almost surely, 2^10221378 is an apocalyptic number.

10221378 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.

10221378 is a wasteful number, since it uses less digits than its factorization.

10221378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703568.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 10221378 is about 3197.0889884393. The cubic root of 10221378 is about 217.0216943348.

Adding to 10221378 its reverse (87312201), we get a palindrome (97533579).

The spelling of 10221378 in words is "ten million, two hundred twenty-one thousand, three hundred seventy-eight".