55563899 has 8 divisors (see below), whose sum is σ = 58035120. Its totient is φ = 53143776.

The previous prime is 55563889. The next prime is 55563901. The reversal of 55563899 is 99836555.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55563899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55563889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10544 + ... + 14909.

It is an arithmetic number, because the mean of its divisors is an integer number (7254390).

Almost surely, 2^55563899 is an apocalyptic number.

55563899 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

55563899 is a deficient number, since it is larger than the sum of its proper divisors (2471221).

55563899 is a wasteful number, since it uses less digits than its factorization.

55563899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25549.

The product of its digits is 1458000, while the sum is 50.

The square root of 55563899 is about 7454.1195992552. The cubic root of 55563899 is about 381.5905149477.

The spelling of 55563899 in words is "fifty-five million, five hundred sixty-three thousand, eight hundred ninety-nine".