211532117 has 4 divisors (see below), whose sum is σ = 212755020. Its totient is φ = 210309216.

The previous prime is 211532107. The next prime is 211532137. The reversal of 211532117 is 711235112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 153908836 + 57623281 = 12406^2 + 7591^2 .

It is a cyclic number.

It is not a de Polignac number, because 211532117 - 2⁸ = 211531861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211532092 and 211532101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211532107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611192 + ... + 611537.

It is an arithmetic number, because the mean of its divisors is an integer number (53188755).

Almost surely, 2^211532117 is an apocalyptic number.

It is an amenable number.

211532117 is a deficient number, since it is larger than the sum of its proper divisors (1222903).

211532117 is a wasteful number, since it uses less digits than its factorization.

211532117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222902.

The product of its digits is 420, while the sum is 23.

The square root of 211532117 is about 14544.1437355384. The cubic root of 211532117 is about 595.8342152964.

Adding to 211532117 its reverse (711235112), we get a palindrome (922767229).

The spelling of 211532117 in words is "two hundred eleven million, five hundred thirty-two thousand, one hundred seventeen".