22311012 has 48 divisors (see below), whose sum is σ = 54714240. Its totient is φ = 7062528.

The previous prime is 22311007. The next prime is 22311019. The reversal of 22311012 is 21011322.

It is a super-3 number, since 3×22311012³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22311019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63028 + ... + 63380.

It is an arithmetic number, because the mean of its divisors is an integer number (1139880).

Almost surely, 2^22311012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22311012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27357120).

22311012 is an abundant number, since it is smaller than the sum of its proper divisors (32403228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22311012 is a wasteful number, since it uses less digits than its factorization.

22311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 22311012 is about 4723.4533976742. The cubic root of 22311012 is about 281.5181651679.

Adding to 22311012 its reverse (21011322), we get a palindrome (43322334).

The spelling of 22311012 in words is "twenty-two million, three hundred eleven thousand, twelve".