55645442 has 8 divisors (see below), whose sum is σ = 85043196. Its totient is φ = 27297712.

The previous prime is 55645439. The next prime is 55645451. The reversal of 55645442 is 24454655.

It can be written as a sum of positive squares in 2 ways, for example, as 54302161 + 1343281 = 7369^2 + 1159^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262373 + ... + 262584.

Almost surely, 2^55645442 is an apocalyptic number.

55645442 is a deficient number, since it is larger than the sum of its proper divisors (29397754).

55645442 is a wasteful number, since it uses less digits than its factorization.

55645442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525012.

The product of its digits is 96000, while the sum is 35.

The square root of 55645442 is about 7459.5872539974. The cubic root of 55645442 is about 381.7770918848. Note that the first 3 decimals are identical.

The spelling of 55645442 in words is "fifty-five million, six hundred forty-five thousand, four hundred forty-two".