102553221 has 4 divisors (see below), whose sum is σ = 136737632. Its totient is φ = 68368812.

The previous prime is 102553147. The next prime is 102553249. The reversal of 102553221 is 122355201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122355201 = 3 ⋅40785067.

It is not a de Polignac number, because 102553221 - 2¹⁷ = 102422149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102553271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17092201 + ... + 17092206.

It is an arithmetic number, because the mean of its divisors is an integer number (34184408).

Almost surely, 2^102553221 is an apocalyptic number.

It is an amenable number.

102553221 is a deficient number, since it is larger than the sum of its proper divisors (34184411).

102553221 is an equidigital number, since it uses as much as digits as its factorization.

102553221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34184410.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 102553221 is about 10126.8564224047. The cubic root of 102553221 is about 468.0760660566.

The spelling of 102553221 in words is "one hundred two million, five hundred fifty-three thousand, two hundred twenty-one".