90551250 has 80 divisors (see below), whose sum is σ = 251544480. Its totient is φ = 24138000.

The previous prime is 90551243. The next prime is 90551273. The reversal of 90551250 is 5215509.

90551250 is a `hidden beast` number, since 90 + 551 + 25 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 32409 + ... + 35091.

It is an arithmetic number, because the mean of its divisors is an integer number (3144306).

Almost surely, 2^90551250 is an apocalyptic number.

90551250 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 90551250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125772240).

90551250 is an abundant number, since it is smaller than the sum of its proper divisors (160993230).

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

90551250 is a wasteful number, since it uses less digits than its factorization.

90551250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 90551250 is about 9515.8420541747. The cubic root of 90551250 is about 449.0535664255.

Adding to 90551250 its reverse (5215509), we get a palindrome (95766759).

The spelling of 90551250 in words is "ninety million, five hundred fifty-one thousand, two hundred fifty".