194256451 has 4 divisors (see below), whose sum is σ = 194764032. Its totient is φ = 193748872.

The previous prime is 194256449. The next prime is 194256457. The reversal of 194256451 is 154652491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154652491 = 7 ⋅22093213.

It is a cyclic number.

It is not a de Polignac number, because 194256451 - 2¹ = 194256449 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 194256451.

It is not an unprimeable number, because it can be changed into a prime (194256457) 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, 253216 + ... + 253981.

It is an arithmetic number, because the mean of its divisors is an integer number (48691008).

Almost surely, 2^194256451 is an apocalyptic number.

194256451 is a deficient number, since it is larger than the sum of its proper divisors (507581).

194256451 is an equidigital number, since it uses as much as digits as its factorization.

194256451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507580.

The product of its digits is 43200, while the sum is 37.

The square root of 194256451 is about 13937.5912911808. The cubic root of 194256451 is about 579.1510081672.

The spelling of 194256451 in words is "one hundred ninety-four million, two hundred fifty-six thousand, four hundred fifty-one".