254205235421 has 2 divisors, whose sum is σ = 254205235422. Its totient is φ = 254205235420.

The previous prime is 254205235399. The next prime is 254205235451. The reversal of 254205235421 is 124532502452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246796329796 + 7408905625 = 496786^2 + 86075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-254205235421 is a prime.

It is a super-3 number, since 3×254205235421³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254205235451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127102617710 + 127102617711.

It is an arithmetic number, because the mean of its divisors is an integer number (127102617711).

Almost surely, 2^254205235421 is an apocalyptic number.

It is an amenable number.

254205235421 is a deficient number, since it is larger than the sum of its proper divisors (1).

254205235421 is an equidigital number, since it uses as much as digits as its factorization.

254205235421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 254205235421 its reverse (124532502452), we get a palindrome (378737737873).

The spelling of 254205235421 in words is "two hundred fifty-four billion, two hundred five million, two hundred thirty-five thousand, four hundred twenty-one".