102355220 has 48 divisors (see below), whose sum is σ = 236815488. Its totient is φ = 36850560.

The previous prime is 102355219. The next prime is 102355247. The reversal of 102355220 is 22553201.

It is a super-2 number, since 2×102355220² = 20953182122496800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 102355192 and 102355201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20402 + ... + 24918.

It is an arithmetic number, because the mean of its divisors is an integer number (4933656).

Almost surely, 2^102355220 is an apocalyptic number.

102355220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102355220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118407744).

102355220 is an abundant number, since it is smaller than the sum of its proper divisors (134460268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102355220 is a wasteful number, since it uses less digits than its factorization.

102355220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4640 (or 4638 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 102355220 is about 10117.0756644398. The cubic root of 102355220 is about 467.7746315487.

The spelling of 102355220 in words is "one hundred two million, three hundred fifty-five thousand, two hundred twenty".