196521151 has 2 divisors, whose sum is σ = 196521152. Its totient is φ = 196521150.

The previous prime is 196521107. The next prime is 196521181. The reversal of 196521151 is 151125691.

It is a strong prime.

It is an emirp because it is prime and its reverse (151125691) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196521151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196521181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98260575 + 98260576.

It is an arithmetic number, because the mean of its divisors is an integer number (98260576).

Almost surely, 2^196521151 is an apocalyptic number.

196521151 is a deficient number, since it is larger than the sum of its proper divisors (1).

196521151 is an equidigital number, since it uses as much as digits as its factorization.

196521151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 31.

The square root of 196521151 is about 14018.6001797612. The cubic root of 196521151 is about 581.3929569211.

The spelling of 196521151 in words is "one hundred ninety-six million, five hundred twenty-one thousand, one hundred fifty-one".