211097439156 has 12 divisors (see below), whose sum is σ = 492560691392. Its totient is φ = 70365813048.

The previous prime is 211097439083. The next prime is 211097439181. The reversal of 211097439156 is 651934790112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×211097439156² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8795726620 + ... + 8795726643.

Almost surely, 2^211097439156 is an apocalyptic number.

It is an amenable number.

211097439156 is an abundant number, since it is smaller than the sum of its proper divisors (281463252236).

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

211097439156 is a wasteful number, since it uses less digits than its factorization.

211097439156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17591453270 (or 17591453268 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 211097439156 in words is "two hundred eleven billion, ninety-seven million, four hundred thirty-nine thousand, one hundred fifty-six".