90512210 has 8 divisors (see below), whose sum is σ = 162921996. Its totient is φ = 36204880.

The previous prime is 90512179. The next prime is 90512221. The reversal of 90512210 is 1221509.

It can be written as a sum of positive squares in 2 ways, for example, as 83850649 + 6661561 = 9157^2 + 2581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4525601 + ... + 4525620.

Almost surely, 2^90512210 is an apocalyptic number.

90512210 is a deficient number, since it is larger than the sum of its proper divisors (72409786).

90512210 is a wasteful number, since it uses less digits than its factorization.

90512210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9051228.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 90512210 is about 9513.7905169286. The cubic root of 90512210 is about 448.9890226035.

Adding to 90512210 its reverse (1221509), we get a palindrome (91733719).

The spelling of 90512210 in words is "ninety million, five hundred twelve thousand, two hundred ten".