102217290 has 64 divisors (see below), whose sum is σ = 292571136. Its totient is φ = 22347072.

The previous prime is 102217289. The next prime is 102217307. The reversal of 102217290 is 92712201.

It is a self number, because there is not a number n which added to its sum of digits gives 102217290.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5752 + ... + 15411.

It is an arithmetic number, because the mean of its divisors is an integer number (4571424).

Almost surely, 2^102217290 is an apocalyptic number.

102217290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102217290 is an abundant number, since it is smaller than the sum of its proper divisors (190353846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102217290 is a wasteful number, since it uses less digits than its factorization.

102217290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21203.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 102217290 is about 10110.2566732996. The cubic root of 102217290 is about 467.5644186637.

Adding to 102217290 its reverse (92712201), we get a palindrome (194929491).

The spelling of 102217290 in words is "one hundred two million, two hundred seventeen thousand, two hundred ninety".