28231222213300 has 72 divisors (see below), whose sum is σ = 64487215679040. Its totient is φ = 10697954803200.

The previous prime is 28231222213279. The next prime is 28231222213301. The reversal of 28231222213300 is 331222213282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231222213301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149505945 + ... + 149694655.

It is an arithmetic number, because the mean of its divisors is an integer number (895655773320).

Almost surely, 2^{28231222213300} is an apocalyptic number.

28231222213300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28231222213300 is an abundant number, since it is smaller than the sum of its proper divisors (36255993465740).

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

28231222213300 is a wasteful number, since it uses less digits than its factorization.

28231222213300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267481 (or 267474 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 28231222213300 its reverse (331222213282), we get a palindrome (28562444426582).

The spelling of 28231222213300 in words is "twenty-eight trillion, two hundred thirty-one billion, two hundred twenty-two million, two hundred thirteen thousand, three hundred".