22013212 has 24 divisors (see below), whose sum is σ = 41743296. Its totient is φ = 10097088.

The previous prime is 22013209. The next prime is 22013221. The reversal of 22013212 is 21231022.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 22013192 and 22013201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7773 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (1739304).

Almost surely, 2^22013212 is an apocalyptic number.

It is an amenable number.

22013212 is a deficient number, since it is larger than the sum of its proper divisors (19730084).

22013212 is a wasteful number, since it uses less digits than its factorization.

22013212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637 (or 2635 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22013212 is about 4691.8239523665. The cubic root of 22013212 is about 280.2600135735.

Adding to 22013212 its reverse (21231022), we get a palindrome (43244234).

The spelling of 22013212 in words is "twenty-two million, thirteen thousand, two hundred twelve".