22212493 has 4 divisors (see below), whose sum is σ = 22224348. Its totient is φ = 22200640.

The previous prime is 22212439. The next prime is 22212527. The reversal of 22212493 is 39421222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 39421222 = 2 ⋅19710611.

It can be written as a sum of positive squares in 2 ways, for example, as 8684809 + 13527684 = 2947^2 + 3678^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22212403) 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, 2428 + ... + 7093.

It is an arithmetic number, because the mean of its divisors is an integer number (5556087).

Almost surely, 2^22212493 is an apocalyptic number.

It is an amenable number.

22212493 is a deficient number, since it is larger than the sum of its proper divisors (11855).

22212493 is an equidigital number, since it uses as much as digits as its factorization.

22212493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11854.

The product of its digits is 1728, while the sum is 25.

The square root of 22212493 is about 4713.0131550845. The cubic root of 22212493 is about 281.1031860588.

The spelling of 22212493 in words is "twenty-two million, two hundred twelve thousand, four hundred ninety-three".