211207381631 has 2 divisors, whose sum is σ = 211207381632. Its totient is φ = 211207381630.

The previous prime is 211207381621. The next prime is 211207381691. The reversal of 211207381631 is 136183702112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211207381631 - 2³⁴ = 194027512447 is a prime.

It is a super-2 number, since 2×211207381631² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211207381591 and 211207381600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211207381621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105603690815 + 105603690816.

It is an arithmetic number, because the mean of its divisors is an integer number (105603690816).

Almost surely, 2^211207381631 is an apocalyptic number.

211207381631 is a deficient number, since it is larger than the sum of its proper divisors (1).

211207381631 is an equidigital number, since it uses as much as digits as its factorization.

211207381631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 211207381631 in words is "two hundred eleven billion, two hundred seven million, three hundred eighty-one thousand, six hundred thirty-one".