102005031 has 4 divisors (see below), whose sum is σ = 136006712. Its totient is φ = 68003352.

The previous prime is 102004997. The next prime is 102005063. The reversal of 102005031 is 130500201.

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

It is not a de Polignac number, because 102005031 - 2⁹ = 102004519 is a prime.

It is a super-2 number, since 2×102005031² = 20810052698621922, 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 = 102004998 and 102005016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102004031) 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 in 3 ways as a sum of consecutive naturals, for example, 17000836 + ... + 17000841.

It is an arithmetic number, because the mean of its divisors is an integer number (34001678).

Almost surely, 2^102005031 is an apocalyptic number.

102005031 is a deficient number, since it is larger than the sum of its proper divisors (34001681).

102005031 is an equidigital number, since it uses as much as digits as its factorization.

102005031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34001680.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 102005031 is about 10099.7540069053. The cubic root of 102005031 is about 467.2405545673.

Adding to 102005031 its reverse (130500201), we get a palindrome (232505232).

The spelling of 102005031 in words is "one hundred two million, five thousand, thirty-one".