217257223271131 has 2 divisors, whose sum is σ = 217257223271132. Its totient is φ = 217257223271130.

The previous prime is 217257223271107. The next prime is 217257223271183. The reversal of 217257223271131 is 131172322752712.

217257223271131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217257223271131 - 2¹³ = 217257223262939 is a prime.

It is a super-2 number, since 2×217257223271131² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (217257223211131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108628611635565 + 108628611635566.

It is an arithmetic number, because the mean of its divisors is an integer number (108628611635566).

Almost surely, 2^{217257223271131} is an apocalyptic number.

217257223271131 is a deficient number, since it is larger than the sum of its proper divisors (1).

217257223271131 is an equidigital number, since it uses as much as digits as its factorization.

217257223271131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 46.

The spelling of 217257223271131 in words is "two hundred seventeen trillion, two hundred fifty-seven billion, two hundred twenty-three million, two hundred seventy-one thousand, one hundred thirty-one".