196855831 has 16 divisors (see below), whose sum is σ = 203777280. Its totient is φ = 190108800.

The previous prime is 196855823. The next prime is 196855843. The reversal of 196855831 is 138558691.

It is a cyclic number.

It is not a de Polignac number, because 196855831 - 2³ = 196855823 is a prime.

It is a super-2 number, since 2×196855831² = 77504436397401122, 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 (196855891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303606 + ... + 1303756.

It is an arithmetic number, because the mean of its divisors is an integer number (12736080).

Almost surely, 2^196855831 is an apocalyptic number.

196855831 is a deficient number, since it is larger than the sum of its proper divisors (6921449).

196855831 is a wasteful number, since it uses less digits than its factorization.

196855831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its digits is 259200, while the sum is 46.

The square root of 196855831 is about 14030.5320996746. The cubic root of 196855831 is about 581.7228115616.

The spelling of 196855831 in words is "one hundred ninety-six million, eight hundred fifty-five thousand, eight hundred thirty-one".