212224143400 has 24 divisors (see below), whose sum is σ = 493421133870. Its totient is φ = 84889657280.

The previous prime is 212224143377. The next prime is 212224143401. The reversal of 212224143400 is 4341422212.

It can be written as a sum of positive squares in 3 ways, for example, as 154161457956 + 58062685444 = 392634^2 + 240962^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (212224143401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 530560159 + ... + 530560558.

Almost surely, 2^212224143400 is an apocalyptic number.

212224143400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212224143400 is an abundant number, since it is smaller than the sum of its proper divisors (281196990470).

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

212224143400 is a wasteful number, since it uses less digits than its factorization.

212224143400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061120733 (or 1061120724 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 212224143400 its reverse (4341422212), we get a palindrome (216565565612).

The spelling of 212224143400 in words is "two hundred twelve billion, two hundred twenty-four million, one hundred forty-three thousand, four hundred".