102203521 has 16 divisors (see below), whose sum is σ = 119877120. Its totient is φ = 85317120.

The previous prime is 102203483. The next prime is 102203533. The reversal of 102203521 is 125302201.

It is not a de Polignac number, because 102203521 - 2⁷ = 102203393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102203495 and 102203504.

It is not an unprimeable number, because it can be changed into a prime (102203551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78645 + ... + 79933.

It is an arithmetic number, because the mean of its divisors is an integer number (7492320).

Almost surely, 2^102203521 is an apocalyptic number.

It is an amenable number.

102203521 is a deficient number, since it is larger than the sum of its proper divisors (17673599).

102203521 is a wasteful number, since it uses less digits than its factorization.

102203521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 102203521 is about 10109.5757082085. The cubic root of 102203521 is about 467.5434235738.

Adding to 102203521 its reverse (125302201), we get a palindrome (227505722).

The spelling of 102203521 in words is "one hundred two million, two hundred three thousand, five hundred twenty-one".