254191643 has 4 divisors (see below), whose sum is σ = 256193280. Its totient is φ = 252190008.

The previous prime is 254191589. The next prime is 254191669. The reversal of 254191643 is 346191452.

254191643 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 is a cyclic number.

It is not a de Polignac number, because 254191643 - 2¹⁰ = 254190619 is a prime.

It is a super-2 number, since 2×254191643² = 129226782742078898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254191673) 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, 1000628 + ... + 1000881.

It is an arithmetic number, because the mean of its divisors is an integer number (64048320).

Almost surely, 2^254191643 is an apocalyptic number.

254191643 is a deficient number, since it is larger than the sum of its proper divisors (2001637).

254191643 is a wasteful number, since it uses less digits than its factorization.

254191643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001636.

The product of its digits is 25920, while the sum is 35.

The square root of 254191643 is about 15943.3886924957. The cubic root of 254191643 is about 633.4617886874.

The spelling of 254191643 in words is "two hundred fifty-four million, one hundred ninety-one thousand, six hundred forty-three".