193481851 has 2 divisors, whose sum is σ = 193481852. Its totient is φ = 193481850.

The previous prime is 193481839. The next prime is 193481903. The reversal of 193481851 is 158184391.

It is a happy number.

193481851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (158184391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193481851 - 2⁹ = 193481339 is a prime.

It is not a weakly prime, because it can be changed into another prime (193481801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96740925 + 96740926.

It is an arithmetic number, because the mean of its divisors is an integer number (96740926).

Almost surely, 2^193481851 is an apocalyptic number.

193481851 is a deficient number, since it is larger than the sum of its proper divisors (1).

193481851 is an equidigital number, since it uses as much as digits as its factorization.

193481851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 40.

The square root of 193481851 is about 13909.7753756126. The cubic root of 193481851 is about 578.3801921096.

The spelling of 193481851 in words is "one hundred ninety-three million, four hundred eighty-one thousand, eight hundred fifty-one".