193081285 has 4 divisors (see below), whose sum is σ = 231697548. Its totient is φ = 154465024.

The previous prime is 193081283. The next prime is 193081303. The reversal of 193081285 is 582180391.

193081285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130370724 + 62710561 = 11418^2 + 7919^2 .

It is a cyclic number.

It is not a de Polignac number, because 193081285 - 2¹ = 193081283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193081283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19308124 + ... + 19308133.

It is an arithmetic number, because the mean of its divisors is an integer number (57924387).

Almost surely, 2^193081285 is an apocalyptic number.

It is an amenable number.

193081285 is a deficient number, since it is larger than the sum of its proper divisors (38616263).

193081285 is an equidigital number, since it uses as much as digits as its factorization.

193081285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38616262.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 193081285 is about 13895.3691926483. The cubic root of 193081285 is about 577.9807756524.

The spelling of 193081285 in words is "one hundred ninety-three million, eighty-one thousand, two hundred eighty-five".