211231387543792 has 80 divisors (see below), whose sum is σ = 510437433699072. Its totient is φ = 82267268060160.

The previous prime is 211231387543697. The next prime is 211231387543793. The reversal of 211231387543792 is 297345783132112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211231387543793) 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, 28646473 + ... + 35257384.

Almost surely, 2^{211231387543792} is an apocalyptic number.

211231387543792 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211231387543792 is an abundant number, since it is smaller than the sum of its proper divisors (299206046155280).

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

211231387543792 is a wasteful number, since it uses less digits than its factorization.

211231387543792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63906566 (or 63906560 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 58.

The spelling of 211231387543792 in words is "two hundred eleven trillion, two hundred thirty-one billion, three hundred eighty-seven million, five hundred forty-three thousand, seven hundred ninety-two".