22231012 has 6 divisors (see below), whose sum is σ = 38904278. Its totient is φ = 11115504.

The previous prime is 22230997. The next prime is 22231037. The reversal of 22231012 is 21013222.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 9216 = 4714^2 + 96^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22230983 and 22231001.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2778873 + ... + 2778880.

Almost surely, 2^22231012 is an apocalyptic number.

It is an amenable number.

22231012 is a deficient number, since it is larger than the sum of its proper divisors (16673266).

22231012 is a wasteful number, since it uses less digits than its factorization.

22231012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5557757 (or 5557755 counting only the distinct ones).

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

The square root of 22231012 is about 4714.9774124592. The cubic root of 22231012 is about 281.1812848095.

Adding to 22231012 its reverse (21013222), we get a palindrome (43244234).

The spelling of 22231012 in words is "twenty-two million, two hundred thirty-one thousand, twelve".