55218504250 has 192 divisors, whose sum is σ = 130077511200. Its totient is φ = 17397273600.

The previous prime is 55218504233. The next prime is 55218504251. The reversal of 55218504250 is 5240581255.

55218504250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 12838929481 + 42379574769 = 113309^2 + 205863^2 .

It is not an unprimeable number, because it can be changed into a prime (55218504251) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 42837606 + ... + 42838894.

Almost surely, 2^55218504250 is an apocalyptic number.

55218504250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55218504250 is an abundant number, since it is smaller than the sum of its proper divisors (74859006950).

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

55218504250 is a wasteful number, since it uses less digits than its factorization.

55218504250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 37.

The spelling of 55218504250 in words is "fifty-five billion, two hundred eighteen million, five hundred four thousand, two hundred fifty".