215513106114551 has 12 divisors (see below), whose sum is σ = 250701305647752. Its totient is φ = 184723761207888.

The previous prime is 215513106114539. The next prime is 215513106114571. The reversal of 215513106114551 is 155411601315512.

It is a de Polignac number, because none of the positive numbers 2^k-215513106114551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215513106114499 and 215513106114508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215513106114571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15718880 + ... + 26040533.

It is an arithmetic number, because the mean of its divisors is an integer number (20891775470646).

Almost surely, 2^{215513106114551} is an apocalyptic number.

215513106114551 is a deficient number, since it is larger than the sum of its proper divisors (35188199533201).

215513106114551 is a wasteful number, since it uses less digits than its factorization.

215513106114551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41864750 (or 41864743 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 41.

The spelling of 215513106114551 in words is "two hundred fifteen trillion, five hundred thirteen billion, one hundred six million, one hundred fourteen thousand, five hundred fifty-one".