1631381159 has 2 divisors, whose sum is σ = 1631381160. Its totient is φ = 1631381158.

The previous prime is 1631381153. The next prime is 1631381161. The reversal of 1631381159 is 9511831361.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1631381159 is a prime.

It is a super-2 number, since 2×1631381159² = 5322808971880366562, which contains 22 as substring.

Together with 1631381161, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631381153) 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, 815690579 + 815690580.

It is an arithmetic number, because the mean of its divisors is an integer number (815690580).

Almost surely, 2^1631381159 is an apocalyptic number.

1631381159 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631381159 is an equidigital number, since it uses as much as digits as its factorization.

1631381159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 1631381159 is about 40390.3597285293. The cubic root of 1631381159 is about 1177.2042303581.

The spelling of 1631381159 in words is "one billion, six hundred thirty-one million, three hundred eighty-one thousand, one hundred fifty-nine".