1631214317 has 4 divisors (see below), whose sum is σ = 1635408060. Its totient is φ = 1627020576.

The previous prime is 1631214307. The next prime is 1631214323. The reversal of 1631214317 is 7134121361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 297942121 + 1333272196 = 17261^2 + 36514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631214317 - 2⁶ = 1631214253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1631214317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631214307) 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 in 3 ways as a sum of consecutive naturals, for example, 2096288 + ... + 2097065.

It is an arithmetic number, because the mean of its divisors is an integer number (408852015).

Almost surely, 2^1631214317 is an apocalyptic number.

It is an amenable number.

1631214317 is a deficient number, since it is larger than the sum of its proper divisors (4193743).

1631214317 is an equidigital number, since it uses as much as digits as its factorization.

1631214317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193742.

The product of its digits is 3024, while the sum is 29.

The square root of 1631214317 is about 40388.2943066429. The cubic root of 1631214317 is about 1177.1640979417.

Adding to 1631214317 its reverse (7134121361), we get a palindrome (8765335678).

The spelling of 1631214317 in words is "one billion, six hundred thirty-one million, two hundred fourteen thousand, three hundred seventeen".