55651558 has 4 divisors (see below), whose sum is σ = 83477340. Its totient is φ = 27825778.

The previous prime is 55651553. The next prime is 55651571. The reversal of 55651558 is 85515655.

It is a happy number.

55651558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85515655 = 5 ⋅17103131.

It is a self number, because there is not a number n which added to its sum of digits gives 55651558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55651553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13912888 + ... + 13912891.

It is an arithmetic number, because the mean of its divisors is an integer number (20869335).

Almost surely, 2^55651558 is an apocalyptic number.

55651558 is a deficient number, since it is larger than the sum of its proper divisors (27825782).

55651558 is a wasteful number, since it uses less digits than its factorization.

55651558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27825781.

The product of its digits is 150000, while the sum is 40.

The square root of 55651558 is about 7459.9971849861. The cubic root of 55651558 is about 381.7910784341.

The spelling of 55651558 in words is "fifty-five million, six hundred fifty-one thousand, five hundred fifty-eight".