102000243442 has 4 divisors (see below), whose sum is σ = 153000365166. Its totient is φ = 51000121720.

The previous prime is 102000243419. The next prime is 102000243481. The reversal of 102000243442 is 244342000201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244342000201 = 13 ⋅18795538477.

It can be written as a sum of positive squares in only one way, i.e., 100412300641 + 1587942801 = 316879^2 + 39849^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25500060859 + ... + 25500060862.

Almost surely, 2^102000243442 is an apocalyptic number.

102000243442 is a deficient number, since it is larger than the sum of its proper divisors (51000121724).

102000243442 is an equidigital number, since it uses as much as digits as its factorization.

102000243442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51000121723.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 102000243442 its reverse (244342000201), we get a palindrome (346342243643).

The spelling of 102000243442 in words is "one hundred two billion, two hundred forty-three thousand, four hundred forty-two".