55554997 has 4 divisors (see below), whose sum is σ = 58822956. Its totient is φ = 52287040.

The previous prime is 55554953. The next prime is 55555001. The reversal of 55554997 is 79945555.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36554116 + 19000881 = 6046^2 + 4359^2 .

It is a cyclic number.

It is not a de Polignac number, because 55554997 - 2¹¹ = 55552949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55554997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55554097) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1633954 + ... + 1633987.

It is an arithmetic number, because the mean of its divisors is an integer number (14705739).

Almost surely, 2^55554997 is an apocalyptic number.

It is an amenable number.

55554997 is a deficient number, since it is larger than the sum of its proper divisors (3267959).

55554997 is a wasteful number, since it uses less digits than its factorization.

55554997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267958.

The product of its digits is 1417500, while the sum is 49.

The square root of 55554997 is about 7453.5224558594. The cubic root of 55554997 is about 381.5701354072.

The spelling of 55554997 in words is "fifty-five million, five hundred fifty-four thousand, nine hundred ninety-seven".