255161563 has 6 divisors (see below), whose sum is σ = 266738444. Its totient is φ = 244067076.

The previous prime is 255161561. The next prime is 255161567. The reversal of 255161563 is 365161552.

It is not a de Polignac number, because 255161563 - 2¹ = 255161561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255161561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 240645 + ... + 241702.

Almost surely, 2^255161563 is an apocalyptic number.

255161563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

255161563 is a deficient number, since it is larger than the sum of its proper divisors (11576881).

255161563 is an equidigital number, since it uses as much as digits as its factorization.

255161563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482393 (or 482370 counting only the distinct ones).

The product of its digits is 27000, while the sum is 34.

The square root of 255161563 is about 15973.7773554034. Note that the first 3 decimals coincide. The cubic root of 255161563 is about 634.2664669187.

The spelling of 255161563 in words is "two hundred fifty-five million, one hundred sixty-one thousand, five hundred sixty-three".