102508221 has 8 divisors (see below), whose sum is σ = 137124064. Its totient is φ = 68115600.

The previous prime is 102508213. The next prime is 102508253. The reversal of 102508221 is 122805201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102508221 - 2³ = 102508213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102508261) 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, 54730 + ... + 56571.

It is an arithmetic number, because the mean of its divisors is an integer number (17140508).

Almost surely, 2^102508221 is an apocalyptic number.

It is an amenable number.

102508221 is a deficient number, since it is larger than the sum of its proper divisors (34615843).

102508221 is a wasteful number, since it uses less digits than its factorization.

102508221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111611.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 102508221 is about 10124.6343637684. The cubic root of 102508221 is about 468.0075926520.

The spelling of 102508221 in words is "one hundred two million, five hundred eight thousand, two hundred twenty-one".