196278431 has 4 divisors (see below), whose sum is σ = 196570752. Its totient is φ = 195986112.

The previous prime is 196278421. The next prime is 196278457. The reversal of 196278431 is 134872691.

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

It is a cyclic number.

It is not a de Polignac number, because 196278431 - 2²² = 192084127 is a prime.

It is a super-2 number, since 2×196278431² = 77050444951643522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196278421) 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, 145151 + ... + 146496.

It is an arithmetic number, because the mean of its divisors is an integer number (49142688).

Almost surely, 2^196278431 is an apocalyptic number.

196278431 is a deficient number, since it is larger than the sum of its proper divisors (292321).

196278431 is an equidigital number, since it uses as much as digits as its factorization.

196278431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292320.

The product of its digits is 72576, while the sum is 41.

The square root of 196278431 is about 14009.9404352767. The cubic root of 196278431 is about 581.1535020597.

The spelling of 196278431 in words is "one hundred ninety-six million, two hundred seventy-eight thousand, four hundred thirty-one".