211378797 has 18 divisors (see below), whose sum is σ = 355174638. Its totient is φ = 120787632.

The previous prime is 211378793. The next prime is 211378813. The reversal of 211378797 is 797873112.

211378797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 184036356 + 27342441 = 13566^2 + 5229^2 .

It is not a de Polignac number, because 211378797 - 2² = 211378793 is a prime.

It is a super-3 number, since 3×211378797³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211378793) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 239218 + ... + 240099.

Almost surely, 2^211378797 is an apocalyptic number.

It is an amenable number.

211378797 is a deficient number, since it is larger than the sum of its proper divisors (143795841).

211378797 is a wasteful number, since it uses less digits than its factorization.

211378797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479337 (or 479327 counting only the distinct ones).

The product of its digits is 148176, while the sum is 45.

The square root of 211378797 is about 14538.8719301052. The cubic root of 211378797 is about 595.6902255274.

The spelling of 211378797 in words is "two hundred eleven million, three hundred seventy-eight thousand, seven hundred ninety-seven".