215170020763081 has 32 divisors (see below), whose sum is σ = 240829833600000. Its totient is φ = 191293522250688.

The previous prime is 215170020763067. The next prime is 215170020763121. The reversal of 215170020763081 is 180367020071512.

215170020763081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 215170020763081 - 2¹⁹ = 215170020238793 is a prime.

It is a super-2 number, since 2×215170020763081² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215170020763381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4503571 + ... + 21227863.

It is an arithmetic number, because the mean of its divisors is an integer number (7525932300000).

Almost surely, 2^{215170020763081} is an apocalyptic number.

It is an amenable number.

215170020763081 is a deficient number, since it is larger than the sum of its proper divisors (25659812836919).

215170020763081 is a wasteful number, since it uses less digits than its factorization.

215170020763081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16724893.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 215170020763081 in words is "two hundred fifteen trillion, one hundred seventy billion, twenty million, seven hundred sixty-three thousand, eighty-one".