211130031 has 8 divisors (see below), whose sum is σ = 321721984. Its totient is φ = 120645720.

The previous prime is 211130027. The next prime is 211130039. The reversal of 211130031 is 130031112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211130031 - 2² = 211130027 is a prime.

It is a super-2 number, since 2×211130031² = 89151779980121922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211129989 and 211130016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211130039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5026885 + ... + 5026926.

It is an arithmetic number, because the mean of its divisors is an integer number (40215248).

Almost surely, 2^211130031 is an apocalyptic number.

211130031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211130031 is a deficient number, since it is larger than the sum of its proper divisors (110591953).

211130031 is a wasteful number, since it uses less digits than its factorization.

211130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10053821.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 211130031 is about 14530.3142085779. The cubic root of 211130031 is about 595.4564498801.

Adding to 211130031 its reverse (130031112), we get a palindrome (341161143).

The spelling of 211130031 in words is "two hundred eleven million, one hundred thirty thousand, thirty-one".