217241131 has 2 divisors, whose sum is σ = 217241132. Its totient is φ = 217241130.

The previous prime is 217241107. The next prime is 217241183. The reversal of 217241131 is 131142712.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217241131 - 2¹⁷ = 217110059 is a prime.

It is a super-2 number, since 2×217241131² = 94387417996318322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (217248131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108620565 + 108620566.

It is an arithmetic number, because the mean of its divisors is an integer number (108620566).

Almost surely, 2^217241131 is an apocalyptic number.

217241131 is a deficient number, since it is larger than the sum of its proper divisors (1).

217241131 is an equidigital number, since it uses as much as digits as its factorization.

217241131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 22.

The square root of 217241131 is about 14739.1021096945. The cubic root of 217241131 is about 601.1470012866.

Adding to 217241131 its reverse (131142712), we get a palindrome (348383843).

The spelling of 217241131 in words is "two hundred seventeen million, two hundred forty-one thousand, one hundred thirty-one".