254041540020521 has 4 divisors (see below), whose sum is σ = 277136225476944. Its totient is φ = 230946854564100.

The previous prime is 254041540020461. The next prime is 254041540020523. The reversal of 254041540020521 is 125020045140452.

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.

It is a cyclic number.

It is not a de Polignac number, because 254041540020521 - 2²² = 254041535826217 is a prime.

It is a super-2 number, since 2×254041540020521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254041540020523) 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, 11547342728195 + ... + 11547342728216.

It is an arithmetic number, because the mean of its divisors is an integer number (69284056369236).

Almost surely, 2^{254041540020521} is an apocalyptic number.

It is an amenable number.

254041540020521 is a deficient number, since it is larger than the sum of its proper divisors (23094685456423).

254041540020521 is a wasteful number, since it uses less digits than its factorization.

254041540020521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23094685456422.

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 254041540020521 its reverse (125020045140452), we get a palindrome (379061585160973).

The spelling of 254041540020521 in words is "two hundred fifty-four trillion, forty-one billion, five hundred forty million, twenty thousand, five hundred twenty-one".