102431019 has 4 divisors (see below), whose sum is σ = 136574696. Its totient is φ = 68287344.

The previous prime is 102431009. The next prime is 102431023. The reversal of 102431019 is 910134201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102431019 - 2¹⁷ = 102299947 is a prime.

It is a super-2 number, since 2×102431019² = 20984227306756722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102430986 and 102431004.

It is not an unprimeable number, because it can be changed into a prime (102431009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17071834 + ... + 17071839.

It is an arithmetic number, because the mean of its divisors is an integer number (34143674).

Almost surely, 2^102431019 is an apocalyptic number.

102431019 is a deficient number, since it is larger than the sum of its proper divisors (34143677).

102431019 is an equidigital number, since it uses as much as digits as its factorization.

102431019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34143676.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 102431019 is about 10120.8210635304. The cubic root of 102431019 is about 467.8900729836.

The spelling of 102431019 in words is "one hundred two million, four hundred thirty-one thousand, nineteen".