102311431240 has 32 divisors (see below), whose sum is σ = 230221239480. Its totient is φ = 40920924672.

The previous prime is 102311431213. The next prime is 102311431259. The reversal of 102311431240 is 42134113201.

It can be written as a sum of positive squares in 4 ways, for example, as 102130098084 + 181333156 = 319578^2 + 13466^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365242 + ... + 581398.

Almost surely, 2^102311431240 is an apocalyptic number.

102311431240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102311431240 is an abundant number, since it is smaller than the sum of its proper divisors (127909808240).

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

102311431240 is a wasteful number, since it uses less digits than its factorization.

102311431240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228001 (or 227997 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 102311431240 its reverse (42134113201), we get a palindrome (144445544441).

The spelling of 102311431240 in words is "one hundred two billion, three hundred eleven million, four hundred thirty-one thousand, two hundred forty".