55307642 has 16 divisors (see below), whose sum is σ = 89746272. Its totient is φ = 25411440.

The previous prime is 55307639. The next prime is 55307653. The reversal of 55307642 is 24670355.

It is a junction number, because it is equal to n+sod(n) for n = 55307599 and 55307608.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1217 + ... + 10587.

It is an arithmetic number, because the mean of its divisors is an integer number (5609142).

Almost surely, 2^55307642 is an apocalyptic number.

55307642 is a deficient number, since it is larger than the sum of its proper divisors (34438630).

55307642 is a wasteful number, since it uses less digits than its factorization.

55307642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9613.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 55307642 is about 7436.9107833831. The cubic root of 55307642 is about 381.0029874640.

Adding to 55307642 its reverse (24670355), we get a palindrome (79977997).

The spelling of 55307642 in words is "fifty-five million, three hundred seven thousand, six hundred forty-two".