55051650 has 144 divisors (see below), whose sum is σ = 160864704. Its totient is φ = 13970880.

The previous prime is 55051637. The next prime is 55051651. The reversal of 55051650 is 5615055.

55051650 is a `hidden beast` number, since 5 + 5 + 0 + 5 + 1 + 650 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55051651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 279352 + ... + 279548.

It is an arithmetic number, because the mean of its divisors is an integer number (1117116).

Almost surely, 2^55051650 is an apocalyptic number.

55051650 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 55051650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80432352).

55051650 is an abundant number, since it is smaller than the sum of its proper divisors (105813054).

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

55051650 is a wasteful number, since it uses less digits than its factorization.

55051650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 55051650 is about 7419.6799122334. The cubic root of 55051650 is about 380.4142527673.

The spelling of 55051650 in words is "fifty-five million, fifty-one thousand, six hundred fifty".