191352481 has 2 divisors, whose sum is σ = 191352482. Its totient is φ = 191352480.

The previous prime is 191352467. The next prime is 191352523. The reversal of 191352481 is 184253191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187251856 + 4100625 = 13684^2 + 2025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191352481 is a prime.

It is a super-2 number, since 2×191352481² = 73231543969710722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191352461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95676240 + 95676241.

It is an arithmetic number, because the mean of its divisors is an integer number (95676241).

Almost surely, 2^191352481 is an apocalyptic number.

It is an amenable number.

191352481 is a deficient number, since it is larger than the sum of its proper divisors (1).

191352481 is an equidigital number, since it uses as much as digits as its factorization.

191352481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 191352481 is about 13833.0213980894. The cubic root of 191352481 is about 576.2505671434.

The spelling of 191352481 in words is "one hundred ninety-one million, three hundred fifty-two thousand, four hundred eighty-one".