198102031 has 2 divisors, whose sum is σ = 198102032. Its totient is φ = 198102030.

The previous prime is 198102011. The next prime is 198102053. The reversal of 198102031 is 130201891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198102031 - 2¹¹ = 198099983 is a prime.

It is a super-2 number, since 2×198102031² = 78488829372649922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198101987 and 198102005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198102011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99051015 + 99051016.

It is an arithmetic number, because the mean of its divisors is an integer number (99051016).

Almost surely, 2^198102031 is an apocalyptic number.

198102031 is a deficient number, since it is larger than the sum of its proper divisors (1).

198102031 is an equidigital number, since it uses as much as digits as its factorization.

198102031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 198102031 is about 14074.8723262415. The cubic root of 198102031 is about 582.9477665044.

The spelling of 198102031 in words is "one hundred ninety-eight million, one hundred two thousand, thirty-one".