90217210 has 16 divisors (see below), whose sum is σ = 164448000. Its totient is φ = 35629776.

The previous prime is 90217207. The next prime is 90217213. The reversal of 90217210 is 1271209.

It is an interprime number because it is at equal distance from previous prime (90217207) and next prime (90217213).

It is not an unprimeable number, because it can be changed into a prime (90217213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56310 + ... + 57889.

It is an arithmetic number, because the mean of its divisors is an integer number (10278000).

Almost surely, 2^90217210 is an apocalyptic number.

90217210 is a deficient number, since it is larger than the sum of its proper divisors (74230790).

90217210 is a wasteful number, since it uses less digits than its factorization.

90217210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114285.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 90217210 is about 9498.2740537426. The cubic root of 90217210 is about 448.5007057247.

Adding to 90217210 its reverse (1271209), we get a palindrome (91488419).

The spelling of 90217210 in words is "ninety million, two hundred seventeen thousand, two hundred ten".