422021543 has 8 divisors (see below), whose sum is σ = 443092080. Its totient is φ = 401385600.

The previous prime is 422021539. The next prime is 422021557. The reversal of 422021543 is 345120224.

It is a happy number.

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 422021543 - 2² = 422021539 is a prime.

It is a super-2 number, since 2×422021543² = 356204365512201698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422021533) 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, 106658 + ... + 110543.

It is an arithmetic number, because the mean of its divisors is an integer number (55386510).

Almost surely, 2^422021543 is an apocalyptic number.

422021543 is a deficient number, since it is larger than the sum of its proper divisors (21070537).

422021543 is a wasteful number, since it uses less digits than its factorization.

422021543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217297.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 422021543 is about 20543.1629258982. The cubic root of 422021543 is about 750.0868302433.

Adding to 422021543 its reverse (345120224), we get a palindrome (767141767).

The spelling of 422021543 in words is "four hundred twenty-two million, twenty-one thousand, five hundred forty-three".