55567998 has 16 divisors (see below), whose sum is σ = 123484560. Its totient is φ = 18522648.

The previous prime is 55567979. The next prime is 55568003. The reversal of 55567998 is 89976555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1029037 = 55567998 / (5 + 5 + 5 + 6 + 7 + 9 + 9 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 514465 + ... + 514572.

It is an arithmetic number, because the mean of its divisors is an integer number (7717785).

Almost surely, 2^55567998 is an apocalyptic number.

55567998 is an abundant number, since it is smaller than the sum of its proper divisors (67916562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55567998 is a wasteful number, since it uses less digits than its factorization.

55567998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029048 (or 1029042 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 54.

The square root of 55567998 is about 7454.3945428184. The cubic root of 55567998 is about 381.5998981448.

It can be divided in two parts, 55567 and 998, that added together give a palindrome (56565).

The spelling of 55567998 in words is "fifty-five million, five hundred sixty-seven thousand, nine hundred ninety-eight".