55245281 has 8 divisors (see below), whose sum is σ = 67994304. Its totient is φ = 43710480.

The previous prime is 55245271. The next prime is 55245341. The reversal of 55245281 is 18254255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55245281 is a prime.

It is a super-2 number, since 2×55245281² = 6104082145537922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55245271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303455 + ... + 303636.

It is an arithmetic number, because the mean of its divisors is an integer number (8499288).

Almost surely, 2^55245281 is an apocalyptic number.

It is an amenable number.

55245281 is a deficient number, since it is larger than the sum of its proper divisors (12749023).

55245281 is a wasteful number, since it uses less digits than its factorization.

55245281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607111.

The product of its digits is 16000, while the sum is 32.

The square root of 55245281 is about 7432.7169325893. The cubic root of 55245281 is about 380.8597362365.

The spelling of 55245281 in words is "fifty-five million, two hundred forty-five thousand, two hundred eighty-one".