211931134 has 4 divisors (see below), whose sum is σ = 317896704. Its totient is φ = 105965566.

The previous prime is 211931113. The next prime is 211931171. The reversal of 211931134 is 431139112.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 211931099 and 211931108.

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, 52982782 + ... + 52982785.

It is an arithmetic number, because the mean of its divisors is an integer number (79474176).

Almost surely, 2^211931134 is an apocalyptic number.

211931134 is a deficient number, since it is larger than the sum of its proper divisors (105965570).

211931134 is a wasteful number, since it uses less digits than its factorization.

211931134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105965569.

The product of its digits is 648, while the sum is 25.

The square root of 211931134 is about 14557.8547183299. The cubic root of 211931134 is about 596.2086243954.

The spelling of 211931134 in words is "two hundred eleven million, nine hundred thirty-one thousand, one hundred thirty-four".