11651538230231 has 2 divisors, whose sum is σ = 11651538230232. Its totient is φ = 11651538230230.

The previous prime is 11651538230207. The next prime is 11651538230281. The reversal of 11651538230231 is 13203283515611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11651538230231 - 2¹⁰ = 11651538229207 is a prime.

It is a super-2 number, since 2×11651538230231² (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 (11651538230201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825769115115 + 5825769115116.

It is an arithmetic number, because the mean of its divisors is an integer number (5825769115116).

Almost surely, 2^{11651538230231} is an apocalyptic number.

11651538230231 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651538230231 is an equidigital number, since it uses as much as digits as its factorization.

11651538230231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 11651538230231 in words is "eleven trillion, six hundred fifty-one billion, five hundred thirty-eight million, two hundred thirty thousand, two hundred thirty-one".