196616251 has 4 divisors (see below), whose sum is σ = 211740592. Its totient is φ = 181491912.

The previous prime is 196616249. The next prime is 196616297. The reversal of 196616251 is 152616691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152616691 = 383 ⋅398477.

It is a cyclic number.

It is not a de Polignac number, because 196616251 - 2¹ = 196616249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 196616251.

It is not an unprimeable number, because it can be changed into a prime (196616221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7562151 + ... + 7562176.

It is an arithmetic number, because the mean of its divisors is an integer number (52935148).

Almost surely, 2^196616251 is an apocalyptic number.

196616251 is a deficient number, since it is larger than the sum of its proper divisors (15124341).

196616251 is a wasteful number, since it uses less digits than its factorization.

196616251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15124340.

The product of its digits is 19440, while the sum is 37.

The square root of 196616251 is about 14021.9916916250. The cubic root of 196616251 is about 581.4867238492.

The spelling of 196616251 in words is "one hundred ninety-six million, six hundred sixteen thousand, two hundred fifty-one".