211457137 has 4 divisors (see below), whose sum is σ = 222586480. Its totient is φ = 200327796.

The previous prime is 211457119. The next prime is 211457143. The reversal of 211457137 is 731754112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211457137 - 2¹¹ = 211455089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211457099 and 211457108.

It is not an unprimeable number, because it can be changed into a prime (211457117) 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 3 ways as a sum of consecutive naturals, for example, 5564643 + ... + 5564680.

It is an arithmetic number, because the mean of its divisors is an integer number (55646620).

Almost surely, 2^211457137 is an apocalyptic number.

It is an amenable number.

211457137 is a deficient number, since it is larger than the sum of its proper divisors (11129343).

211457137 is a wasteful number, since it uses less digits than its factorization.

211457137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11129342.

The product of its digits is 5880, while the sum is 31.

The square root of 211457137 is about 14541.5658372818. The cubic root of 211457137 is about 595.7638068721.

It can be divided in two parts, 21145 and 7137, that added together give a palindrome (28282).

The spelling of 211457137 in words is "two hundred eleven million, four hundred fifty-seven thousand, one hundred thirty-seven".