55849551 has 4 divisors (see below), whose sum is σ = 74466072. Its totient is φ = 37233032.

The previous prime is 55849499. The next prime is 55849553. The reversal of 55849551 is 15594855.

It is a happy number.

55849551 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.

It is a cyclic number.

It is not a de Polignac number, because 55849551 - 2⁶ = 55849487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55849553) 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 in 3 ways as a sum of consecutive naturals, for example, 9308256 + ... + 9308261.

It is an arithmetic number, because the mean of its divisors is an integer number (18616518).

Almost surely, 2^55849551 is an apocalyptic number.

55849551 is a deficient number, since it is larger than the sum of its proper divisors (18616521).

55849551 is a wasteful number, since it uses less digits than its factorization.

55849551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18616520.

The product of its digits is 180000, while the sum is 42.

The square root of 55849551 is about 7473.2557162190. The cubic root of 55849551 is about 382.2433119103.

The spelling of 55849551 in words is "fifty-five million, eight hundred forty-nine thousand, five hundred fifty-one".