102568221 has 24 divisors (see below), whose sum is σ = 176763840. Its totient is φ = 58609656.

The previous prime is 102568211. The next prime is 102568261. The reversal of 102568221 is 122865201.

It is a happy number.

It is not a de Polignac number, because 102568221 - 2⁷ = 102568093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102568211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37441 + ... + 40086.

It is an arithmetic number, because the mean of its divisors is an integer number (7365160).

Almost surely, 2^102568221 is an apocalyptic number.

It is an amenable number.

102568221 is a deficient number, since it is larger than the sum of its proper divisors (74195619).

102568221 is an equidigital number, since it uses as much as digits as its factorization.

102568221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77550 (or 77537 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 102568221 is about 10127.5970002760. The cubic root of 102568221 is about 468.0988860735.

The spelling of 102568221 in words is "one hundred two million, five hundred sixty-eight thousand, two hundred twenty-one".