55391473281 has 16 divisors (see below), whose sum is σ = 77778699840. Its totient is φ = 34967761920.

The previous prime is 55391473253. The next prime is 55391473283. The reversal of 55391473281 is 18237419355.

55391473281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55391473281 - 2⁶ = 55391473217 is a prime.

It is a super-2 number, since 2×55391473281² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55391473281.

It is not an unprimeable number, because it can be changed into a prime (55391473283) 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, 102960 + ... + 348401.

It is an arithmetic number, because the mean of its divisors is an integer number (4861168740).

Almost surely, 2^55391473281 is an apocalyptic number.

It is an amenable number.

55391473281 is a deficient number, since it is larger than the sum of its proper divisors (22387226559).

55391473281 is a wasteful number, since it uses less digits than its factorization.

55391473281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453536.

The product of its digits is 907200, while the sum is 48.

The spelling of 55391473281 in words is "fifty-five billion, three hundred ninety-one million, four hundred seventy-three thousand, two hundred eighty-one".