255406402223 has 4 divisors (see below), whose sum is σ = 291893031120. Its totient is φ = 218919773328.

The previous prime is 255406402217. The next prime is 255406402267. The reversal of 255406402223 is 322204604552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255406402223 - 2⁸ = 255406401967 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 (255406408223) 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, 18243314438 + ... + 18243314451.

It is an arithmetic number, because the mean of its divisors is an integer number (72973257780).

Almost surely, 2^255406402223 is an apocalyptic number.

255406402223 is a deficient number, since it is larger than the sum of its proper divisors (36486628897).

255406402223 is an equidigital number, since it uses as much as digits as its factorization.

255406402223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36486628896.

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 255406402223 in words is "two hundred fifty-five billion, four hundred six million, four hundred two thousand, two hundred twenty-three".