102543212225 has 12 divisors (see below), whose sum is σ = 127158637740. Its totient is φ = 82031308800.

The previous prime is 102543212221. The next prime is 102543212243. The reversal of 102543212225 is 522212345201.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 21552882481 + 80990329744 = 146809^2 + 284588^2 .

It is not a de Polignac number, because 102543212225 - 2² = 102543212221 is a prime.

It is a super-2 number, since 2×102543212225² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (102543212221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 711041 + ... + 843009.

It is an arithmetic number, because the mean of its divisors is an integer number (10596553145).

Almost surely, 2^102543212225 is an apocalyptic number.

It is an amenable number.

102543212225 is a deficient number, since it is larger than the sum of its proper divisors (24615425515).

102543212225 is a wasteful number, since it uses less digits than its factorization.

102543212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163060 (or 163055 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 102543212225 its reverse (522212345201), we get a palindrome (624755557426).

The spelling of 102543212225 in words is "one hundred two billion, five hundred forty-three million, two hundred twelve thousand, two hundred twenty-five".