55047642 has 32 divisors (see below), whose sum is σ = 119519232. Its totient is φ = 16801344.

The previous prime is 55047637. The next prime is 55047647. The reversal of 55047642 is 24674055.

It is an interprime number because it is at equal distance from previous prime (55047637) and next prime (55047647).

It is not an unprimeable number, because it can be changed into a prime (55047647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7128 + ... + 12684.

It is an arithmetic number, because the mean of its divisors is an integer number (3734976).

Almost surely, 2^55047642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55047642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59759616).

55047642 is an abundant number, since it is smaller than the sum of its proper divisors (64471590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55047642 is a wasteful number, since it uses less digits than its factorization.

55047642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702.

The product of its (nonzero) digits is 33600, while the sum is 33.

The square root of 55047642 is about 7419.4098148033. The cubic root of 55047642 is about 380.4050206049.

The spelling of 55047642 in words is "fifty-five million, forty-seven thousand, six hundred forty-two".