102515402550 has 96 divisors (see below), whose sum is σ = 279053032320. Its totient is φ = 24699686400.

The previous prime is 102515402543. The next prime is 102515402573. The reversal of 102515402550 is 55204515201.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78366 + ... + 459534.

It is an arithmetic number, because the mean of its divisors is an integer number (2906802420).

Almost surely, 2^102515402550 is an apocalyptic number.

102515402550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102515402550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139526516160).

102515402550 is an abundant number, since it is smaller than the sum of its proper divisors (176537629770).

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

102515402550 is a wasteful number, since it uses less digits than its factorization.

102515402550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381358 (or 381353 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 102515402550 its reverse (55204515201), we get a palindrome (157719917751).

The spelling of 102515402550 in words is "one hundred two billion, five hundred fifteen million, four hundred two thousand, five hundred fifty".