255520330447 has 2 divisors, whose sum is σ = 255520330448. Its totient is φ = 255520330446.

The previous prime is 255520330423. The next prime is 255520330451. The reversal of 255520330447 is 744033025552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255520330447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255520339447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127760165223 + 127760165224.

It is an arithmetic number, because the mean of its divisors is an integer number (127760165224).

Almost surely, 2^255520330447 is an apocalyptic number.

255520330447 is a deficient number, since it is larger than the sum of its proper divisors (1).

255520330447 is an equidigital number, since it uses as much as digits as its factorization.

255520330447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 40.

Adding to 255520330447 its reverse (744033025552), we get a palindrome (999553355999).

The spelling of 255520330447 in words is "two hundred fifty-five billion, five hundred twenty million, three hundred thirty thousand, four hundred forty-seven".