1671611231 has 2 divisors, whose sum is σ = 1671611232. Its totient is φ = 1671611230.

The previous prime is 1671611191. The next prime is 1671611239. The reversal of 1671611231 is 1321161761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671611231 is a prime.

It is a super-2 number, since 2×1671611231² = 5588568215210670722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1671611194 and 1671611203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671611239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835805615 + 835805616.

It is an arithmetic number, because the mean of its divisors is an integer number (835805616).

Almost surely, 2^1671611231 is an apocalyptic number.

1671611231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671611231 is an equidigital number, since it uses as much as digits as its factorization.

1671611231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 1671611231 is about 40885.3424958138. The cubic root of 1671611231 is about 1186.8024297690.

Adding to 1671611231 its reverse (1321161761), we get a palindrome (2992772992).

The spelling of 1671611231 in words is "one billion, six hundred seventy-one million, six hundred eleven thousand, two hundred thirty-one".