255747197 has 8 divisors (see below), whose sum is σ = 260277240. Its totient is φ = 251228160.

The previous prime is 255747181. The next prime is 255747199. The reversal of 255747197 is 791747552.

It can be written as a sum of positive squares in 4 ways, for example, as 85026841 + 170720356 = 9221^2 + 13066^2 .

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 255747197 - 2⁴ = 255747181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255747199) 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, 54413 + ... + 58925.

It is an arithmetic number, because the mean of its divisors is an integer number (32534655).

Almost surely, 2^255747197 is an apocalyptic number.

It is an amenable number.

255747197 is a deficient number, since it is larger than the sum of its proper divisors (4530043).

255747197 is an equidigital number, since it uses as much as digits as its factorization.

255747197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503.

The product of its digits is 617400, while the sum is 47.

The square root of 255747197 is about 15992.0979549276. The cubic root of 255747197 is about 634.7513416640.

The spelling of 255747197 in words is "two hundred fifty-five million, seven hundred forty-seven thousand, one hundred ninety-seven".