211240208434 has 16 divisors (see below), whose sum is σ = 319602248856. Its totient is φ = 104709942400.

The previous prime is 211240208419. The next prime is 211240208449. The reversal of 211240208434 is 434802042112.

It is an interprime number because it is at equal distance from previous prime (211240208419) and next prime (211240208449).

It can be written as a sum of positive squares in 4 ways, for example, as 197042771025 + 14197437409 = 443895^2 + 119153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211240208396 and 211240208405.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843277 + ... + 1064704.

Almost surely, 2^211240208434 is an apocalyptic number.

211240208434 is a deficient number, since it is larger than the sum of its proper divisors (108362040422).

211240208434 is a wasteful number, since it uses less digits than its factorization.

211240208434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908461.

The product of its (nonzero) digits is 12288, while the sum is 31.

The spelling of 211240208434 in words is "two hundred eleven billion, two hundred forty million, two hundred eight thousand, four hundred thirty-four".