55215150 has 96 divisors (see below), whose sum is σ = 147847680. Its totient is φ = 13585920.

The previous prime is 55215119. The next prime is 55215161. The reversal of 55215150 is 5151255.

55215150 = T₁₆₄ + T₁₆₅ + ... + T₆₉₄.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55215150.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 150267 + ... + 150633.

It is an arithmetic number, because the mean of its divisors is an integer number (1540080).

Almost surely, 2^55215150 is an apocalyptic number.

55215150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55215150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73923840).

55215150 is an abundant number, since it is smaller than the sum of its proper divisors (92632530).

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

55215150 is a wasteful number, since it uses less digits than its factorization.

55215150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 55215150 is about 7430.6897391830. The cubic root of 55215150 is about 380.7904828304.

The spelling of 55215150 in words is "fifty-five million, two hundred fifteen thousand, one hundred fifty".