102251242544 has 80 divisors (see below), whose sum is σ = 220866863616. Its totient is φ = 45458745600.

The previous prime is 102251242529. The next prime is 102251242573. The reversal of 102251242544 is 445242152201.

It is a self number, because there is not a number n which added to its sum of digits gives 102251242544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16433354 + ... + 16439574.

Almost surely, 2^102251242544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102251242544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110433431808).

102251242544 is an abundant number, since it is smaller than the sum of its proper divisors (118615621072).

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

102251242544 is a wasteful number, since it uses less digits than its factorization.

102251242544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8274 (or 8268 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 102251242544 its reverse (445242152201), we get a palindrome (547493394745).

The spelling of 102251242544 in words is "one hundred two billion, two hundred fifty-one million, two hundred forty-two thousand, five hundred forty-four".