102020550 has 96 divisors (see below), whose sum is σ = 267840000. Its totient is φ = 25656960.

The previous prime is 102020537. The next prime is 102020561. The reversal of 102020550 is 55020201.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 204201 + ... + 204699.

It is an arithmetic number, because the mean of its divisors is an integer number (2790000).

Almost surely, 2^102020550 is an apocalyptic number.

102020550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 102020550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133920000).

102020550 is an abundant number, since it is smaller than the sum of its proper divisors (165819450).

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

102020550 is a wasteful number, since it uses less digits than its factorization.

102020550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 102020550 is about 10100.5222637248. The cubic root of 102020550 is about 467.2642486224.

Adding to 102020550 its reverse (55020201), we get a palindrome (157040751).

The spelling of 102020550 in words is "one hundred two million, twenty thousand, five hundred fifty".