55042747 has 4 divisors (see below), whose sum is σ = 55610296. Its totient is φ = 54475200.

The previous prime is 55042739. The next prime is 55042759. The reversal of 55042747 is 74724055.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55042747 - 2³ = 55042739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55042777) 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, 283629 + ... + 283822.

It is an arithmetic number, because the mean of its divisors is an integer number (13902574).

Almost surely, 2^55042747 is an apocalyptic number.

55042747 is a deficient number, since it is larger than the sum of its proper divisors (567549).

55042747 is an equidigital number, since it uses as much as digits as its factorization.

55042747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567548.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 55042747 is about 7419.0799294791. The cubic root of 55042747 is about 380.3937446888.

The spelling of 55042747 in words is "fifty-five million, forty-two thousand, seven hundred forty-seven".