255406623 has 16 divisors (see below), whose sum is σ = 361933920. Its totient is φ = 159650816.

The previous prime is 255406609. The next prime is 255406631. The reversal of 255406623 is 326604552.

It is a cyclic number.

It is not a de Polignac number, because 255406623 - 2¹⁰ = 255405599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255401623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4411 + ... + 23027.

It is an arithmetic number, because the mean of its divisors is an integer number (22620870).

Almost surely, 2^255406623 is an apocalyptic number.

255406623 is a deficient number, since it is larger than the sum of its proper divisors (106527297).

255406623 is a wasteful number, since it uses less digits than its factorization.

255406623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18906.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 255406623 is about 15981.4462111537. The cubic root of 255406623 is about 634.4694541360.

The spelling of 255406623 in words is "two hundred fifty-five million, four hundred six thousand, six hundred twenty-three".