1431661211 has 2 divisors, whose sum is σ = 1431661212. Its totient is φ = 1431661210.

The previous prime is 1431661199. The next prime is 1431661213. The reversal of 1431661211 is 1121661341.

It is a strong prime.

It is an emirp because it is prime and its reverse (1121661341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1431661211 - 2¹⁰ = 1431660187 is a prime.

Together with 1431661213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1431661213) 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, 715830605 + 715830606.

It is an arithmetic number, because the mean of its divisors is an integer number (715830606).

Almost surely, 2^1431661211 is an apocalyptic number.

1431661211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431661211 is an equidigital number, since it uses as much as digits as its factorization.

1431661211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 1431661211 is about 37837.2992032994. The cubic root of 1431661211 is about 1127.0592633046.

The spelling of 1431661211 in words is "one billion, four hundred thirty-one million, six hundred sixty-one thousand, two hundred eleven".