198210431 has 2 divisors, whose sum is σ = 198210432. Its totient is φ = 198210430.

The previous prime is 198210409. The next prime is 198210469. The reversal of 198210431 is 134012891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198210431 - 2²² = 194016127 is a prime.

It is a super-2 number, since 2×198210431² = 78574749914411522, 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 = 198210394 and 198210403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198210491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99105215 + 99105216.

It is an arithmetic number, because the mean of its divisors is an integer number (99105216).

Almost surely, 2^198210431 is an apocalyptic number.

198210431 is a deficient number, since it is larger than the sum of its proper divisors (1).

198210431 is an equidigital number, since it uses as much as digits as its factorization.

198210431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 198210431 is about 14078.7226338187. The cubic root of 198210431 is about 583.0540753849.

The spelling of 198210431 in words is "one hundred ninety-eight million, two hundred ten thousand, four hundred thirty-one".