102305431 has 2 divisors, whose sum is σ = 102305432. Its totient is φ = 102305430.

The previous prime is 102305419. The next prime is 102305447. The reversal of 102305431 is 134503201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102305431 - 2⁹ = 102304919 is a prime.

It is a super-2 number, since 2×102305431² = 20932802424191522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102305399 and 102305408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102305461) by changing a digit.

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 as a sum of consecutive naturals, namely, 51152715 + 51152716.

It is an arithmetic number, because the mean of its divisors is an integer number (51152716).

Almost surely, 2^102305431 is an apocalyptic number.

102305431 is a deficient number, since it is larger than the sum of its proper divisors (1).

102305431 is an equidigital number, since it uses as much as digits as its factorization.

102305431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 102305431 is about 10114.6147232606. The cubic root of 102305431 is about 467.6987721755.

Adding to 102305431 its reverse (134503201), we get a palindrome (236808632).

The spelling of 102305431 in words is "one hundred two million, three hundred five thousand, four hundred thirty-one".