10231531551991 has 2 divisors, whose sum is σ = 10231531551992. Its totient is φ = 10231531551990.

The previous prime is 10231531551973. The next prime is 10231531552013. The reversal of 10231531551991 is 19915513513201.

It is a weak prime.

It is an emirp because it is prime and its reverse (19915513513201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10231531551991 - 2⁴³ = 1435438529783 is a prime.

It is a super-2 number, since 2×10231531551991² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10231534551991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5115765775995 + 5115765775996.

It is an arithmetic number, because the mean of its divisors is an integer number (5115765775996).

Almost surely, 2^{10231531551991} is an apocalyptic number.

10231531551991 is a deficient number, since it is larger than the sum of its proper divisors (1).

10231531551991 is an equidigital number, since it uses as much as digits as its factorization.

10231531551991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 182250, while the sum is 46.

The spelling of 10231531551991 in words is "ten trillion, two hundred thirty-one billion, five hundred thirty-one million, five hundred fifty-one thousand, nine hundred ninety-one".