55442347 has 4 divisors (see below), whose sum is σ = 55591360. Its totient is φ = 55293336.

The previous prime is 55442341. The next prime is 55442357. The reversal of 55442347 is 74324455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74324455 = 5 ⋅14864891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55442347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55442341) 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, 73947 + ... + 74692.

It is an arithmetic number, because the mean of its divisors is an integer number (13897840).

Almost surely, 2^55442347 is an apocalyptic number.

55442347 is a deficient number, since it is larger than the sum of its proper divisors (149013).

55442347 is a wasteful number, since it uses less digits than its factorization.

55442347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149012.

The product of its digits is 67200, while the sum is 34.

The square root of 55442347 is about 7445.9617914679. The cubic root of 55442347 is about 381.3120550427.

The spelling of 55442347 in words is "fifty-five million, four hundred forty-two thousand, three hundred forty-seven".