254340041521 has 4 divisors (see below), whose sum is σ = 269301220452. Its totient is φ = 239378862592.

The previous prime is 254340041447. The next prime is 254340041531. The reversal of 254340041521 is 125140043452.

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 229092420496 + 25247621025 = 478636^2 + 158895^2 .

It is a cyclic number.

It is not a de Polignac number, because 254340041521 - 2¹³ = 254340033329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254340041531) 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, 7480589440 + ... + 7480589473.

It is an arithmetic number, because the mean of its divisors is an integer number (67325305113).

Almost surely, 2^254340041521 is an apocalyptic number.

It is an amenable number.

254340041521 is a deficient number, since it is larger than the sum of its proper divisors (14961178931).

254340041521 is a wasteful number, since it uses less digits than its factorization.

254340041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14961178930.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 254340041521 its reverse (125140043452), we get a palindrome (379480084973).

The spelling of 254340041521 in words is "two hundred fifty-four billion, three hundred forty million, forty-one thousand, five hundred twenty-one".