102220525 has 24 divisors (see below), whose sum is σ = 138812544. Its totient is φ = 74054400.

The previous prime is 102220523. The next prime is 102220543. The reversal of 102220525 is 525022201.

It is not a de Polignac number, because 102220525 - 2¹ = 102220523 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 (102220523) 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, 92124 + ... + 93226.

It is an arithmetic number, because the mean of its divisors is an integer number (5783856).

Almost surely, 2^102220525 is an apocalyptic number.

It is an amenable number.

102220525 is a deficient number, since it is larger than the sum of its proper divisors (36592019).

102220525 is a wasteful number, since it uses less digits than its factorization.

102220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 102220525 is about 10110.4166580809. The cubic root of 102220525 is about 467.5693511460.

Adding to 102220525 its reverse (525022201), we get a palindrome (627242726).

The spelling of 102220525 in words is "one hundred two million, two hundred twenty thousand, five hundred twenty-five".