231348731 has 4 divisors (see below), whose sum is σ = 243525000. Its totient is φ = 219172464.

The previous prime is 231348713. The next prime is 231348737. The reversal of 231348731 is 137843132.

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 231348731 - 2¹⁴ = 231332347 is a prime.

It is a super-2 number, since 2×231348731² = 107044470670620722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231348737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6088106 + ... + 6088143.

It is an arithmetic number, because the mean of its divisors is an integer number (60881250).

Almost surely, 2^231348731 is an apocalyptic number.

231348731 is a deficient number, since it is larger than the sum of its proper divisors (12176269).

231348731 is a wasteful number, since it uses less digits than its factorization.

231348731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12176268.

The product of its digits is 12096, while the sum is 32.

The square root of 231348731 is about 15210.1522346096. The cubic root of 231348731 is about 613.8878536598.

The spelling of 231348731 in words is "two hundred thirty-one million, three hundred forty-eight thousand, seven hundred thirty-one".