211155000015 has 32 divisors (see below), whose sum is σ = 341139363840. Its totient is φ = 111520043136.

The previous prime is 211154999983. The next prime is 211155000019. The reversal of 211155000015 is 510000551112.

It is not a de Polignac number, because 211155000015 - 2⁵ = 211154999983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211154999955 and 211155000000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211155000019) 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, 2945184 + ... + 3016026.

It is an arithmetic number, because the mean of its divisors is an integer number (10660605120).

Almost surely, 2^211155000015 is an apocalyptic number.

211155000015 is a deficient number, since it is larger than the sum of its proper divisors (129984363825).

211155000015 is a wasteful number, since it uses less digits than its factorization.

211155000015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72783.

The product of its (nonzero) digits is 250, while the sum is 21.

Adding to 211155000015 its reverse (510000551112), we get a palindrome (721155551127).

The spelling of 211155000015 in words is "two hundred eleven billion, one hundred fifty-five million, fifteen", and thus it is an aban number.