55019810 has 8 divisors (see below), whose sum is σ = 99035676. Its totient is φ = 22007920.

The previous prime is 55019807. The next prime is 55019831. The reversal of 55019810 is 1891055.

It can be written as a sum of positive squares in 2 ways, for example, as 55011889 + 7921 = 7417^2 + 89^2 .

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

It is a super-2 number, since 2×55019810² = 6054358984872200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2750981 + ... + 2751000.

Almost surely, 2^55019810 is an apocalyptic number.

55019810 is a deficient number, since it is larger than the sum of its proper divisors (44015866).

55019810 is a wasteful number, since it uses less digits than its factorization.

55019810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501988.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 55019810 is about 7417.5339567811. The cubic root of 55019810 is about 380.3408990732.

The spelling of 55019810 in words is "fifty-five million, nineteen thousand, eight hundred ten".