55429281 has 12 divisors (see below), whose sum is σ = 80260180. Its totient is φ = 36862560.

The previous prime is 55429273. The next prime is 55429307. The reversal of 55429281 is 18292455.

55429281 is a `hidden beast` number, since 554 + 29 + 2 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3459600 + 51969681 = 1860^2 + 7209^2 .

It is not a de Polignac number, because 55429281 - 2³ = 55429273 is a prime.

It is a super-2 number, since 2×55429281² = 6144810384353922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55429201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3526 + ... + 11103.

Almost surely, 2^55429281 is an apocalyptic number.

It is an amenable number.

55429281 is a deficient number, since it is larger than the sum of its proper divisors (24830899).

55429281 is a wasteful number, since it uses less digits than its factorization.

55429281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15056 (or 15053 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 55429281 is about 7445.0843514362. The cubic root of 55429281 is about 381.2820983098.

The spelling of 55429281 in words is "fifty-five million, four hundred twenty-nine thousand, two hundred eighty-one".