22352021 has 8 divisors (see below), whose sum is σ = 23385024. Its totient is φ = 21324160.

The previous prime is 22351993. The next prime is 22352051. The reversal of 22352021 is 12025322.

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 22352021 - 2¹⁸ = 22089877 is a prime.

It is a super-2 number, since 2×22352021² = 999225685568882, 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 (22352051) 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, 9701 + ... + 11781.

It is an arithmetic number, because the mean of its divisors is an integer number (2923128).

Almost surely, 2^22352021 is an apocalyptic number.

It is an amenable number.

22352021 is a deficient number, since it is larger than the sum of its proper divisors (1033003).

22352021 is a wasteful number, since it uses less digits than its factorization.

22352021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22352021 is about 4727.7924023798. The cubic root of 22352021 is about 281.6905421136.

Adding to 22352021 its reverse (12025322), we get a palindrome (34377343).

The spelling of 22352021 in words is "twenty-two million, three hundred fifty-two thousand, twenty-one".