22721071 has 8 divisors (see below), whose sum is σ = 23879504. Its totient is φ = 21591360.

The previous prime is 22721057. The next prime is 22721081. The reversal of 22721071 is 17012722.

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 22721071 - 2²¹ = 20623919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22721021) 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, 5550 + ... + 8731.

It is an arithmetic number, because the mean of its divisors is an integer number (2984938).

Almost surely, 2^22721071 is an apocalyptic number.

22721071 is a deficient number, since it is larger than the sum of its proper divisors (1158433).

22721071 is a wasteful number, since it uses less digits than its factorization.

22721071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14361.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 22721071 is about 4766.6624592056. The cubic root of 22721071 is about 283.2324003422.

Adding to 22721071 its reverse (17012722), we get a palindrome (39733793).

The spelling of 22721071 in words is "twenty-two million, seven hundred twenty-one thousand, seventy-one".