2191939151 has 2 divisors, whose sum is σ = 2191939152. Its totient is φ = 2191939150.

The previous prime is 2191939129. The next prime is 2191939157. The reversal of 2191939151 is 1519391912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2191939151 - 2¹⁴ = 2191922767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2191939099 and 2191939108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2191939157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095969575 + 1095969576.

It is an arithmetic number, because the mean of its divisors is an integer number (1095969576).

Almost surely, 2^2191939151 is an apocalyptic number.

2191939151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191939151 is an equidigital number, since it uses as much as digits as its factorization.

2191939151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 41.

The square root of 2191939151 is about 46818.1498032547. The cubic root of 2191939151 is about 1299.0010374921.

The spelling of 2191939151 in words is "two billion, one hundred ninety-one million, nine hundred thirty-nine thousand, one hundred fifty-one".