1263551131 has 2 divisors, whose sum is σ = 1263551132. Its totient is φ = 1263551130.

The previous prime is 1263551117. The next prime is 1263551153. The reversal of 1263551131 is 1311553621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263551131 - 2¹¹ = 1263549083 is a prime.

It is a super-2 number, since 2×1263551131² = 3193122921302758322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1263551131.

It is not a weakly prime, because it can be changed into another prime (1263551101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631775565 + 631775566.

It is an arithmetic number, because the mean of its divisors is an integer number (631775566).

Almost surely, 2^1263551131 is an apocalyptic number.

1263551131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263551131 is an equidigital number, since it uses as much as digits as its factorization.

1263551131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 28.

The square root of 1263551131 is about 35546.4643952110. The cubic root of 1263551131 is about 1081.0960326679.

The spelling of 1263551131 in words is "one billion, two hundred sixty-three million, five hundred fifty-one thousand, one hundred thirty-one".