90021310 has 16 divisors (see below), whose sum is σ = 169083936. Its totient is φ = 34442848.

The previous prime is 90021271. The next prime is 90021313. The reversal of 90021310 is 1312009.

It is a super-2 number, since 2×90021310² = 16207672508232200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90021313) 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, 195469 + ... + 195928.

It is an arithmetic number, because the mean of its divisors is an integer number (10567746).

Almost surely, 2^90021310 is an apocalyptic number.

90021310 is a deficient number, since it is larger than the sum of its proper divisors (79062626).

90021310 is a wasteful number, since it uses less digits than its factorization.

90021310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391427.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 90021310 is about 9487.9560496453. The cubic root of 90021310 is about 448.1758417664.

Adding to 90021310 its reverse (1312009), we get a palindrome (91333319).

The spelling of 90021310 in words is "ninety million, twenty-one thousand, three hundred ten".