55015000 has 40 divisors (see below), whose sum is σ = 128911860. Its totient is φ = 22004000.

The previous prime is 55014991. The next prime is 55015019. The reversal of 55015000 is 51055.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 502 + ... + 10501.

Almost surely, 2^55015000 is an apocalyptic number.

55015000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55015000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64455930).

55015000 is an abundant number, since it is smaller than the sum of its proper divisors (73896860).

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

55015000 is a wasteful number, since it uses less digits than its factorization.

55015000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11029 (or 11010 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 55015000 is about 7417.2097179465. The cubic root of 55015000 is about 380.3298152288.

Adding to 55015000 its reverse (51055), we get a palindrome (55066055).

It can be divided in two parts, 5501 and 5000, that added together give a palindrome (10501).

The spelling of 55015000 in words is "fifty-five million, fifteen thousand".