515135111430450 has 192 divisors, whose sum is σ = 1470235898880000. Its totient is φ = 116923352282880.

The previous prime is 515135111430427. The next prime is 515135111430503. The reversal of 515135111430450 is 54034111531515.

It is a junction number, because it is equal to n+sod(n) for n = 515135111430399 and 515135111430408.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 581394871 + ... + 582280229.

It is an arithmetic number, because the mean of its divisors is an integer number (7657478640000).

Almost surely, 2^{515135111430450} is an apocalyptic number.

515135111430450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 515135111430450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735117949440000).

515135111430450 is an abundant number, since it is smaller than the sum of its proper divisors (955100787449550).

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

515135111430450 is a wasteful number, since it uses less digits than its factorization.

515135111430450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889249 (or 889244 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 39.

Adding to 515135111430450 its reverse (54034111531515), we get a palindrome (569169222961965).

The spelling of 515135111430450 in words is "five hundred fifteen trillion, one hundred thirty-five billion, one hundred eleven million, four hundred thirty thousand, four hundred fifty".