102415220 has 24 divisors (see below), whose sum is σ = 215818344. Its totient is φ = 40823936.

The previous prime is 102415199. The next prime is 102415241. The reversal of 102415220 is 22514201.

It is an interprime number because it is at equal distance from previous prime (102415199) and next prime (102415241).

It can be written as a sum of positive squares in 4 ways, for example, as 12013156 + 90402064 = 3466^2 + 9508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2879 + ... + 14598.

It is an arithmetic number, because the mean of its divisors is an integer number (8992431).

Almost surely, 2^102415220 is an apocalyptic number.

102415220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102415220 is an abundant number, since it is smaller than the sum of its proper divisors (113403124).

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

102415220 is a wasteful number, since it uses less digits than its factorization.

102415220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17779 (or 17777 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 102415220 is about 10120.0405137529. The cubic root of 102415220 is about 467.8660158980.

Adding to 102415220 its reverse (22514201), we get a palindrome (124929421).

The spelling of 102415220 in words is "one hundred two million, four hundred fifteen thousand, two hundred twenty".