2191903567231 has 16 divisors (see below), whose sum is σ = 2614000172544. Its totient is φ = 1797052159584.

The previous prime is 2191903567229. The next prime is 2191903567291. The reversal of 2191903567231 is 1327653091912.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2191903567231 - 2¹ = 2191903567229 is a prime.

It is a super-2 number, since 2×2191903567231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191903567291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10223176 + ... + 10435378.

It is an arithmetic number, because the mean of its divisors is an integer number (163375010784).

Almost surely, 2^{2191903567231} is an apocalyptic number.

2191903567231 is a deficient number, since it is larger than the sum of its proper divisors (422096605313).

2191903567231 is a wasteful number, since it uses less digits than its factorization.

2191903567231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276390.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 2191903567231 in words is "two trillion, one hundred ninety-one billion, nine hundred three million, five hundred sixty-seven thousand, two hundred thirty-one".