82216450 has 24 divisors (see below), whose sum is σ = 158198580. Its totient is φ = 31752000.

The previous prime is 82216447. The next prime is 82216481. The reversal of 82216450 is 5461228.

It can be written as a sum of positive squares in 6 ways, for example, as 36397089 + 45819361 = 6033^2 + 6769^2 .

It is a super-3 number, since 3×82216450³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26901 + ... + 29800.

Almost surely, 2^82216450 is an apocalyptic number.

82216450 is a deficient number, since it is larger than the sum of its proper divisors (75982130).

82216450 is a wasteful number, since it uses less digits than its factorization.

82216450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56742 (or 56737 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 82216450 is about 9067.3287135738. The cubic root of 82216450 is about 434.8300741151.

Adding to 82216450 its reverse (5461228), we get a palindrome (87677678).

The spelling of 82216450 in words is "eighty-two million, two hundred sixteen thousand, four hundred fifty".