254640523 has 2 divisors, whose sum is σ = 254640524. Its totient is φ = 254640522.

The previous prime is 254640509. The next prime is 254640557. The reversal of 254640523 is 325046452.

254640523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254640523 - 2¹³ = 254632331 is a prime.

It is equal to p_13919215 and since 254640523 and 13919215 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (254640563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127320261 + 127320262.

It is an arithmetic number, because the mean of its divisors is an integer number (127320262).

Almost surely, 2^254640523 is an apocalyptic number.

254640523 is a deficient number, since it is larger than the sum of its proper divisors (1).

254640523 is an equidigital number, since it uses as much as digits as its factorization.

254640523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 254640523 is about 15957.4597915834. The cubic root of 254640523 is about 633.8344486096.

Adding to 254640523 its reverse (325046452), we get a palindrome (579686975).

The spelling of 254640523 in words is "two hundred fifty-four million, six hundred forty thousand, five hundred twenty-three".