194151253 has 4 divisors (see below), whose sum is σ = 204369760. Its totient is φ = 183932748.

The previous prime is 194151229. The next prime is 194151281. The reversal of 194151253 is 352151491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 352151491 = 19 ⋅18534289.

It is a cyclic number.

It is not a de Polignac number, because 194151253 - 2¹⁷ = 194020181 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 (194151283) 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, 5109225 + ... + 5109262.

It is an arithmetic number, because the mean of its divisors is an integer number (51092440).

Almost surely, 2^194151253 is an apocalyptic number.

It is an amenable number.

194151253 is a deficient number, since it is larger than the sum of its proper divisors (10218507).

194151253 is a wasteful number, since it uses less digits than its factorization.

194151253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10218506.

The product of its digits is 5400, while the sum is 31.

The square root of 194151253 is about 13933.8168855486. The cubic root of 194151253 is about 579.0464444514.

The spelling of 194151253 in words is "one hundred ninety-four million, one hundred fifty-one thousand, two hundred fifty-three".