215115413256510 has 96 divisors (see below), whose sum is σ = 559170989647200. Its totient is φ = 52939600257024.

The previous prime is 215115413256509. The next prime is 215115413256521. The reversal of 215115413256510 is 15652314511512.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17837166 + ... + 27356814.

It is an arithmetic number, because the mean of its divisors is an integer number (5824697808825).

Almost surely, 2^{215115413256510} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215115413256510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279585494823600).

215115413256510 is an abundant number, since it is smaller than the sum of its proper divisors (344055576390690).

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

215115413256510 is a wasteful number, since it uses less digits than its factorization.

215115413256510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9524142 (or 9524129 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 42.

The spelling of 215115413256510 in words is "two hundred fifteen trillion, one hundred fifteen billion, four hundred thirteen million, two hundred fifty-six thousand, five hundred ten".