255474391 has 2 divisors, whose sum is σ = 255474392. Its totient is φ = 255474390.

The previous prime is 255474367. The next prime is 255474397. The reversal of 255474391 is 193474552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255474391 - 2¹⁵ = 255441623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255474397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127737195 + 127737196.

It is an arithmetic number, because the mean of its divisors is an integer number (127737196).

Almost surely, 2^255474391 is an apocalyptic number.

255474391 is a deficient number, since it is larger than the sum of its proper divisors (1).

255474391 is an equidigital number, since it uses as much as digits as its factorization.

255474391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 40.

The square root of 255474391 is about 15983.5662791506. The cubic root of 255474391 is about 634.5255645626.

The spelling of 255474391 in words is "two hundred fifty-five million, four hundred seventy-four thousand, three hundred ninety-one".