55201500 has 240 divisors, whose sum is σ = 190270080. Its totient is φ = 13910400.

The previous prime is 55201463. The next prime is 55201507. The reversal of 55201500 is 510255.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55201507) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1174477 + ... + 1174523.

It is an arithmetic number, because the mean of its divisors is an integer number (792792).

Almost surely, 2^55201500 is an apocalyptic number.

55201500 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 55201500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95135040).

55201500 is an abundant number, since it is smaller than the sum of its proper divisors (135068580).

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

55201500 is a wasteful number, since it uses less digits than its factorization.

55201500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 55201500 is about 7429.7711943236. The cubic root of 55201500 is about 380.7591012351.

Adding to 55201500 its reverse (510255), we get a palindrome (55711755).

The spelling of 55201500 in words is "fifty-five million, two hundred one thousand, five hundred".