255135551 has 8 divisors (see below), whose sum is σ = 278448384. Its totient is φ = 231842520.

The previous prime is 255135547. The next prime is 255135557. The reversal of 255135551 is 155531552.

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 255135551 - 2² = 255135547 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 (255135557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39020 + ... + 45086.

It is an arithmetic number, because the mean of its divisors is an integer number (34806048).

Almost surely, 2^255135551 is an apocalyptic number.

255135551 is a deficient number, since it is larger than the sum of its proper divisors (23312833).

255135551 is a wasteful number, since it uses less digits than its factorization.

255135551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9901.

The product of its digits is 18750, while the sum is 32.

The square root of 255135551 is about 15972.9631252313. The cubic root of 255135551 is about 634.2449131238.

The spelling of 255135551 in words is "two hundred fifty-five million, one hundred thirty-five thousand, five hundred fifty-one".