10531363991 has 2 divisors, whose sum is σ = 10531363992. Its totient is φ = 10531363990.

The previous prime is 10531363987. The next prime is 10531364003. The reversal of 10531363991 is 19936313501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10531363991 - 2² = 10531363987 is a prime.

It is a super-2 number, since 2×10531363991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10531363951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5265681995 + 5265681996.

It is an arithmetic number, because the mean of its divisors is an integer number (5265681996).

Almost surely, 2^10531363991 is an apocalyptic number.

10531363991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10531363991 is an equidigital number, since it uses as much as digits as its factorization.

10531363991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 41.

The spelling of 10531363991 in words is "ten billion, five hundred thirty-one million, three hundred sixty-three thousand, nine hundred ninety-one".