255515501 has 8 divisors (see below), whose sum is σ = 257270904. Its totient is φ = 253765120.

The previous prime is 255515479. The next prime is 255515521. The reversal of 255515501 is 105515552.

It can be written as a sum of positive squares in 4 ways, for example, as 56987401 + 198528100 = 7549^2 + 14090^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255515501 - 2¹⁰ = 255514477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255515521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187061 + ... + 188421.

It is an arithmetic number, because the mean of its divisors is an integer number (32158863).

Almost surely, 2^255515501 is an apocalyptic number.

It is an amenable number.

255515501 is a deficient number, since it is larger than the sum of its proper divisors (1755403).

255515501 is a wasteful number, since it uses less digits than its factorization.

255515501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511.

The product of its (nonzero) digits is 6250, while the sum is 29.

The square root of 255515501 is about 15984.8522357887. The cubic root of 255515501 is about 634.5595979110.

The spelling of 255515501 in words is "two hundred fifty-five million, five hundred fifteen thousand, five hundred one".