254051521 has 4 divisors (see below), whose sum is σ = 254205952. Its totient is φ = 253897092.

The previous prime is 254051507. The next prime is 254051533. The reversal of 254051521 is 125150452.

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 254051521 - 2⁷ = 254051393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254051221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74721 + ... + 78046.

It is an arithmetic number, because the mean of its divisors is an integer number (63551488).

Almost surely, 2^254051521 is an apocalyptic number.

It is an amenable number.

254051521 is a deficient number, since it is larger than the sum of its proper divisors (154431).

254051521 is a wasteful number, since it uses less digits than its factorization.

254051521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154430.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 254051521 is about 15938.9937260794. The cubic root of 254051521 is about 633.3453696389.

The spelling of 254051521 in words is "two hundred fifty-four million, fifty-one thousand, five hundred twenty-one".