1631203253 has 2 divisors, whose sum is σ = 1631203254. Its totient is φ = 1631203252.

The previous prime is 1631203247. The next prime is 1631203279. The reversal of 1631203253 is 3523021361.

It is an a-pointer prime, because the next prime (1631203279) can be obtained adding 1631203253 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1494827569 + 136375684 = 38663^2 + 11678^2 .

It is an emirp because it is prime and its reverse (3523021361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1631203253 - 2¹⁰ = 1631202229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631203213) 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, 815601626 + 815601627.

It is an arithmetic number, because the mean of its divisors is an integer number (815601627).

Almost surely, 2^1631203253 is an apocalyptic number.

It is an amenable number.

1631203253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631203253 is an equidigital number, since it uses as much as digits as its factorization.

1631203253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1631203253 is about 40388.1573360311. The cubic root of 1631203253 is about 1177.1614364943.

The spelling of 1631203253 in words is "one billion, six hundred thirty-one million, two hundred three thousand, two hundred fifty-three".