215256877011 has 12 divisors (see below), whose sum is σ = 339192654840. Its totient is φ = 130458713280.

The previous prime is 215256876983. The next prime is 215256877049. The reversal of 215256877011 is 110778652512.

215256877011 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 568 + 7 + 70 + 11 = 666.

It is not a de Polignac number, because 215256877011 - 2¹⁷ = 215256745939 is a prime.

It is a super-3 number, since 3×215256877011³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (215256877081) 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, 1087155846 + ... + 1087156043.

It is an arithmetic number, because the mean of its divisors is an integer number (28266054570).

Almost surely, 2^215256877011 is an apocalyptic number.

215256877011 is a deficient number, since it is larger than the sum of its proper divisors (123935777829).

215256877011 is a wasteful number, since it uses less digits than its factorization.

215256877011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174311906 (or 2174311903 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 45.

The spelling of 215256877011 in words is "two hundred fifteen billion, two hundred fifty-six million, eight hundred seventy-seven thousand, eleven".