211266252056 has 64 divisors (see below), whose sum is σ = 427472640000. Its totient is φ = 97557315840.

The previous prime is 211266252053. The next prime is 211266252061. The reversal of 211266252056 is 650252662112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211266252053) 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, 8506745 + ... + 8531543.

It is an arithmetic number, because the mean of its divisors is an integer number (6679260000).

Almost surely, 2^211266252056 is an apocalyptic number.

It is an amenable number.

211266252056 is an abundant number, since it is smaller than the sum of its proper divisors (216206387944).

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

211266252056 is a wasteful number, since it uses less digits than its factorization.

211266252056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26232 (or 26228 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 211266252056 in words is "two hundred eleven billion, two hundred sixty-six million, two hundred fifty-two thousand, fifty-six".