22528400212 has 24 divisors (see below), whose sum is σ = 40410459936. Its totient is φ = 10983449568.

The previous prime is 22528400207. The next prime is 22528400231. The reversal of 22528400212 is 21200482522.

It is a super-2 number, since 2×22528400212² (a number of 22 digits) contains 22 as substring.

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, 10603 + ... + 212530.

It is an arithmetic number, because the mean of its divisors is an integer number (1683769164).

Almost surely, 2^22528400212 is an apocalyptic number.

It is an amenable number.

22528400212 is a deficient number, since it is larger than the sum of its proper divisors (17882059724).

22528400212 is a wasteful number, since it uses less digits than its factorization.

22528400212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223767 (or 223765 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 22528400212 its reverse (21200482522), we get a palindrome (43728882734).

It can be divided in two parts, 22528 and 400212, that added together give a triangular number (422740 = T₉₁₉).

The spelling of 22528400212 in words is "twenty-two billion, five hundred twenty-eight million, four hundred thousand, two hundred twelve".