102031219 has 4 divisors (see below), whose sum is σ = 104202144. Its totient is φ = 99860296.

The previous prime is 102031213. The next prime is 102031231. The reversal of 102031219 is 912130201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912130201 = 11173 ⋅81637.

It is a cyclic number.

It is not a de Polignac number, because 102031219 - 2³ = 102031211 is a prime.

It is a super-2 number, since 2×102031219² = 20820739301251922, 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 = 102031196 and 102031205.

It is not an unprimeable number, because it can be changed into a prime (102031211) 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, 1085392 + ... + 1085485.

It is an arithmetic number, because the mean of its divisors is an integer number (26050536).

Almost surely, 2^102031219 is an apocalyptic number.

102031219 is a deficient number, since it is larger than the sum of its proper divisors (2170925).

102031219 is an equidigital number, since it uses as much as digits as its factorization.

102031219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170924.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 102031219 is about 10101.0503909247. The cubic root of 102031219 is about 467.2805364144.

The spelling of 102031219 in words is "one hundred two million, thirty-one thousand, two hundred nineteen".