90220210 has 16 divisors (see below), whose sum is σ = 162504792. Its totient is φ = 36064000.

The previous prime is 90220201. The next prime is 90220211. The reversal of 90220210 is 1202209.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 81558961 + 8661249 = 9031^2 + 2943^2 .

It is not an unprimeable number, because it can be changed into a prime (90220211) 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, 26400 + ... + 29620.

Almost surely, 2^90220210 is an apocalyptic number.

90220210 is a deficient number, since it is larger than the sum of its proper divisors (72284582).

90220210 is a wasteful number, since it uses less digits than its factorization.

90220210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6029.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 90220210 is about 9498.4319758579. The cubic root of 90220210 is about 448.5056770127.

Adding to 90220210 its reverse (1202209), we get a palindrome (91422419).

It can be divided in two parts, 902 and 20210, that added together give a palindrome (21112).

The spelling of 90220210 in words is "ninety million, two hundred twenty thousand, two hundred ten".