243131896 has 32 divisors (see below), whose sum is σ = 543651840. Its totient is φ = 99668448.

The previous prime is 243131887. The next prime is 243131899. The reversal of 243131896 is 698131342.

It is a super-2 number, since 2×243131896² = 118226237705109632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243131899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93096 + ... + 95671.

It is an arithmetic number, because the mean of its divisors is an integer number (16989120).

Almost surely, 2^243131896 is an apocalyptic number.

It is an amenable number.

243131896 is an abundant number, since it is smaller than the sum of its proper divisors (300519944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243131896 is a wasteful number, since it uses less digits than its factorization.

243131896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188803 (or 188799 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 243131896 is about 15592.6872603795. The cubic root of 243131896 is about 624.1380296780.

The spelling of 243131896 in words is "two hundred forty-three million, one hundred thirty-one thousand, eight hundred ninety-six".