196515731 has 2 divisors, whose sum is σ = 196515732. Its totient is φ = 196515730.

The previous prime is 196515707. The next prime is 196515791. The reversal of 196515731 is 137515691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196515731 - 2⁶ = 196515667 is a prime.

It is a super-2 number, since 2×196515731² = 77236865060928722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196515791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98257865 + 98257866.

It is an arithmetic number, because the mean of its divisors is an integer number (98257866).

Almost surely, 2^196515731 is an apocalyptic number.

196515731 is a deficient number, since it is larger than the sum of its proper divisors (1).

196515731 is an equidigital number, since it uses as much as digits as its factorization.

196515731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 38.

The square root of 196515731 is about 14018.4068638344. The cubic root of 196515731 is about 581.3876119853.

The spelling of 196515731 in words is "one hundred ninety-six million, five hundred fifteen thousand, seven hundred thirty-one".