231106731 has 8 divisors (see below), whose sum is σ = 308562240. Its totient is φ = 153861192.

The previous prime is 231106727. The next prime is 231106741. The reversal of 231106731 is 137601132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231106731 - 2² = 231106727 is a prime.

It is a super-2 number, since 2×231106731² = 106820642227012722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231106741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49905 + ... + 54338.

It is an arithmetic number, because the mean of its divisors is an integer number (38570280).

Almost surely, 2^231106731 is an apocalyptic number.

231106731 is a deficient number, since it is larger than the sum of its proper divisors (77455509).

231106731 is a wasteful number, since it uses less digits than its factorization.

231106731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104985.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 231106731 is about 15202.1949402052. The cubic root of 231106731 is about 613.6737285880.

Adding to 231106731 its reverse (137601132), we get a palindrome (368707863).

The spelling of 231106731 in words is "two hundred thirty-one million, one hundred six thousand, seven hundred thirty-one".