211297692 has 48 divisors (see below), whose sum is σ = 523545120. Its totient is φ = 66097152.

The previous prime is 211297687. The next prime is 211297693. The reversal of 211297692 is 296792112.

It is a self number, because there is not a number n which added to its sum of digits gives 211297692.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211297693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79684 + ... + 82292.

It is an arithmetic number, because the mean of its divisors is an integer number (10907190).

Almost surely, 2^211297692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 211297692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261772560).

211297692 is an abundant number, since it is smaller than the sum of its proper divisors (312247428).

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

211297692 is a wasteful number, since it uses less digits than its factorization.

211297692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030 (or 3028 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 211297692 is about 14536.0824158368. The cubic root of 211297692 is about 595.6140279823.

The spelling of 211297692 in words is "two hundred eleven million, two hundred ninety-seven thousand, six hundred ninety-two".