51280055401 has 3 divisors (see below), whose sum is σ = 51280281853. Its totient is φ = 51279828950.

The previous prime is 51280055389. The next prime is 51280055429. The reversal of 51280055401 is 10455008215.

The square root of 51280055401 is 226451.

It is a perfect power (a square), and thus also a powerful number.

51280055401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 51280055401 - 2⁵ = 51280055369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51280055441) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 113226 + ... + 339676.

Almost surely, 2^51280055401 is an apocalyptic number.

51280055401 is the 226451-st square number.

51280055401 is the 113226-th centered octagonal number.

It is an amenable number.

51280055401 is a deficient number, since it is larger than the sum of its proper divisors (226452).

51280055401 is an frugal number, since it uses more digits than its factorization.

51280055401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452902 (or 226451 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 51280055401 in words is "fifty-one billion, two hundred eighty million, fifty-five thousand, four hundred one".