255612031517 has 4 divisors (see below), whose sum is σ = 255692239296. Its totient is φ = 255531823740.

The previous prime is 255612031459. The next prime is 255612031541. The reversal of 255612031517 is 715130216552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255612031517 - 2⁶ = 255612031453 is a prime.

It is a super-3 number, since 3×255612031517³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255612031817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40099109 + ... + 40105482.

It is an arithmetic number, because the mean of its divisors is an integer number (63923059824).

Almost surely, 2^255612031517 is an apocalyptic number.

It is an amenable number.

255612031517 is a deficient number, since it is larger than the sum of its proper divisors (80207779).

255612031517 is an equidigital number, since it uses as much as digits as its factorization.

255612031517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80207778.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 255612031517 in words is "two hundred fifty-five billion, six hundred twelve million, thirty-one thousand, five hundred seventeen".