55146281 has 4 divisors (see below), whose sum is σ = 55305552. Its totient is φ = 54987012.

The previous prime is 55146277. The next prime is 55146331. The reversal of 55146281 is 18264155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55146281 - 2² = 55146277 is a prime.

It is a super-2 number, since 2×55146281² = 6082224616261922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55146211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79115 + ... + 79808.

It is an arithmetic number, because the mean of its divisors is an integer number (13826388).

Almost surely, 2^55146281 is an apocalyptic number.

It is an amenable number.

55146281 is a deficient number, since it is larger than the sum of its proper divisors (159271).

55146281 is a wasteful number, since it uses less digits than its factorization.

55146281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159270.

The product of its digits is 9600, while the sum is 32.

The square root of 55146281 is about 7426.0542012565. The cubic root of 55146281 is about 380.6320989416.

The spelling of 55146281 in words is "fifty-five million, one hundred forty-six thousand, two hundred eighty-one".