201613231 has 2 divisors, whose sum is σ = 201613232. Its totient is φ = 201613230.

The previous prime is 201613211. The next prime is 201613253. The reversal of 201613231 is 132316102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201613231 - 2¹¹ = 201611183 is a prime.

It is a super-2 number, since 2×201613231² = 81295789828518722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201613199 and 201613208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201613211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100806615 + 100806616.

It is an arithmetic number, because the mean of its divisors is an integer number (100806616).

Almost surely, 2^201613231 is an apocalyptic number.

201613231 is a deficient number, since it is larger than the sum of its proper divisors (1).

201613231 is an equidigital number, since it uses as much as digits as its factorization.

201613231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 201613231 is about 14199.0573982923. The cubic root of 201613231 is about 586.3717108408.

Adding to 201613231 its reverse (132316102), we get a palindrome (333929333).

The spelling of 201613231 in words is "two hundred one million, six hundred thirteen thousand, two hundred thirty-one".