211313997 has 12 divisors (see below), whose sum is σ = 312330304. Its totient is φ = 137599560.

The previous prime is 211313989. The next prime is 211314007. The reversal of 211313997 is 799313112.

It is a happy number.

It is not a de Polignac number, because 211313997 - 2³ = 211313989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211313957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272629 + ... + 273402.

Almost surely, 2^211313997 is an apocalyptic number.

It is an amenable number.

211313997 is a deficient number, since it is larger than the sum of its proper divisors (101016307).

211313997 is a wasteful number, since it uses less digits than its factorization.

211313997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546080 (or 546077 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 211313997 is about 14536.6432507646. The cubic root of 211313997 is about 595.6293479744.

It can be divided in two parts, 2113 and 13997, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 211313997 in words is "two hundred eleven million, three hundred thirteen thousand, nine hundred ninety-seven".