231668811 has 48 divisors (see below), whose sum is σ = 386560512. Its totient is φ = 132316800.

The previous prime is 231668807. The next prime is 231668813. The reversal of 231668811 is 118866132.

231668811 = T₃₄₆ + T₃₄₇ + ... + T₁₁₂₆.

It is not a de Polignac number, because 231668811 - 2² = 231668807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231668813) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 160951 + ... + 162383.

It is an arithmetic number, because the mean of its divisors is an integer number (8053344).

Almost surely, 2^231668811 is an apocalyptic number.

231668811 is a deficient number, since it is larger than the sum of its proper divisors (154891701).

231668811 is a wasteful number, since it uses less digits than its factorization.

231668811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1541 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 231668811 is about 15220.6705174247. The cubic root of 231668811 is about 614.1708357971.

The spelling of 231668811 in words is "two hundred thirty-one million, six hundred sixty-eight thousand, eight hundred eleven".