215081276153550 has 24 divisors (see below), whose sum is σ = 533401564861176. Its totient is φ = 57355006974240.

The previous prime is 215081276153531. The next prime is 215081276153581. The reversal of 215081276153550 is 55351672180512.

It is a junction number, because it is equal to n+sod(n) for n = 215081276153493 and 215081276153502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 716937587029 + ... + 716937587328.

It is an arithmetic number, because the mean of its divisors is an integer number (22225065202549).

Almost surely, 2^{215081276153550} is an apocalyptic number.

215081276153550 is an abundant number, since it is smaller than the sum of its proper divisors (318320288707626).

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

215081276153550 is a wasteful number, since it uses less digits than its factorization.

215081276153550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433875174372 (or 1433875174367 counting only the distinct ones).

The product of its (nonzero) digits is 2520000, while the sum is 51.

The spelling of 215081276153550 in words is "two hundred fifteen trillion, eighty-one billion, two hundred seventy-six million, one hundred fifty-three thousand, five hundred fifty".