211274157257 has 4 divisors (see below), whose sum is σ = 211287322896. Its totient is φ = 211260991620.

The previous prime is 211274157203. The next prime is 211274157271. The reversal of 211274157257 is 752751472112.

211274157257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211274157257 - 2⁸ = 211274157001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211274157287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6558719 + ... + 6590852.

It is an arithmetic number, because the mean of its divisors is an integer number (52821830724).

Almost surely, 2^211274157257 is an apocalyptic number.

It is an amenable number.

211274157257 is a deficient number, since it is larger than the sum of its proper divisors (13165639).

211274157257 is a wasteful number, since it uses less digits than its factorization.

211274157257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13165638.

The product of its digits is 274400, while the sum is 44.

The spelling of 211274157257 in words is "two hundred eleven billion, two hundred seventy-four million, one hundred fifty-seven thousand, two hundred fifty-seven".