102431330 has 24 divisors (see below), whose sum is σ = 188423388. Its totient is φ = 40092128.

The previous prime is 102431327. The next prime is 102431359. The reversal of 102431330 is 33134201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 98346889 + 4084441 = 9917^2 + 2021^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102431299 and 102431308.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19772 + ... + 24408.

Almost surely, 2^102431330 is an apocalyptic number.

102431330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102431330 is a deficient number, since it is larger than the sum of its proper divisors (85992058).

102431330 is an equidigital number, since it uses as much as digits as its factorization.

102431330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4738 (or 4691 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 102431330 is about 10120.8364278848. The cubic root of 102431330 is about 467.8905465174.

Adding to 102431330 its reverse (33134201), we get a palindrome (135565531).

The spelling of 102431330 in words is "one hundred two million, four hundred thirty-one thousand, three hundred thirty".