102440323220 has 12 divisors (see below), whose sum is σ = 215124678804. Its totient is φ = 40976129280.

The previous prime is 102440323213. The next prime is 102440323243. The reversal of 102440323220 is 22323044201.

It can be written as a sum of positive squares in 2 ways, for example, as 75618400144 + 26821923076 = 274988^2 + 163774^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2561008061 + ... + 2561008100.

It is an arithmetic number, because the mean of its divisors is an integer number (17927056567).

Almost surely, 2^102440323220 is an apocalyptic number.

102440323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102440323220 is an abundant number, since it is smaller than the sum of its proper divisors (112684355584).

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

102440323220 is a wasteful number, since it uses less digits than its factorization.

102440323220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122016170 (or 5122016168 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 102440323220 its reverse (22323044201), we get a palindrome (124763367421).

The spelling of 102440323220 in words is "one hundred two billion, four hundred forty million, three hundred twenty-three thousand, two hundred twenty".