211631317267456 has 22 divisors (see below), whose sum is σ = 423055963328690. Its totient is φ = 105815658633216.

The previous prime is 211631317267421. The next prime is 211631317267483. The reversal of 211631317267456 is 654762713136112.

It can be written as a sum of positive squares in only one way, i.e., 203699118182400 + 7932199085056 = 14272320^2 + 2816416^2 .

It is a super-2 number, since 2×211631317267456² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211631317267397 and 211631317267406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103335603111 + ... + 103335605158.

Almost surely, 2^{211631317267456} is an apocalyptic number.

It is an amenable number.

211631317267456 is a deficient number, since it is larger than the sum of its proper divisors (211424646061234).

211631317267456 is an equidigital number, since it uses as much as digits as its factorization.

211631317267456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206671208289 (or 206671208271 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The spelling of 211631317267456 in words is "two hundred eleven trillion, six hundred thirty-one billion, three hundred seventeen million, two hundred sixty-seven thousand, four hundred fifty-six".