55150320 has 160 divisors (see below), whose sum is σ = 181988352. Its totient is φ = 13787136.

The previous prime is 55150301. The next prime is 55150321. The reversal of 55150320 is 2305155.

It is a super-2 number, since 2×55150320² = 6083115592204800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55150321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 535389 + ... + 535491.

Almost surely, 2^55150320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55150320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90994176).

55150320 is an abundant number, since it is smaller than the sum of its proper divisors (126838032).

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

55150320 is a wasteful number, since it uses less digits than its factorization.

55150320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55150320 is about 7426.3261441981. The cubic root of 55150320 is about 380.6413914118.

Adding to 55150320 its reverse (2305155), we get a palindrome (57455475).

The spelling of 55150320 in words is "fifty-five million, one hundred fifty thousand, three hundred twenty".