422221750 has 16 divisors (see below), whose sum is σ = 790399584. Its totient is φ = 168888600.

The previous prime is 422221717. The next prime is 422221753. The reversal of 422221750 is 57122224.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422221753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 844194 + ... + 844693.

It is an arithmetic number, because the mean of its divisors is an integer number (49399974).

Almost surely, 2^422221750 is an apocalyptic number.

422221750 is a deficient number, since it is larger than the sum of its proper divisors (368177834).

422221750 is a wasteful number, since it uses less digits than its factorization.

422221750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688904 (or 1688894 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 422221750 is about 20548.0351858760. The cubic root of 422221750 is about 750.2054252103.

Adding to 422221750 its reverse (57122224), we get a palindrome (479343974).

The spelling of 422221750 in words is "four hundred twenty-two million, two hundred twenty-one thousand, seven hundred fifty".