255545421 has 16 divisors (see below), whose sum is σ = 368356800. Its totient is φ = 157033728.

The previous prime is 255545417. The next prime is 255545447. The reversal of 255545421 is 124545552.

It is not a de Polignac number, because 255545421 - 2² = 255545417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255545471) 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, 58476 + ... + 62693.

It is an arithmetic number, because the mean of its divisors is an integer number (23022300).

Almost surely, 2^255545421 is an apocalyptic number.

It is an amenable number.

255545421 is a deficient number, since it is larger than the sum of its proper divisors (112811379).

255545421 is a wasteful number, since it uses less digits than its factorization.

255545421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121228.

The product of its digits is 40000, while the sum is 33.

The square root of 255545421 is about 15985.7880944294. The cubic root of 255545421 is about 634.5843652045.

The spelling of 255545421 in words is "two hundred fifty-five million, five hundred forty-five thousand, four hundred twenty-one".