231209667 has 32 divisors (see below), whose sum is σ = 377484800. Its totient is φ = 138964896.

The previous prime is 231209653. The next prime is 231209677. The reversal of 231209667 is 766902132.

It is not a de Polignac number, because 231209667 - 2⁶ = 231209603 is a prime.

It is a super-2 number, since 2×231209667² = 106915820228501778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231209617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7434 + ... + 22752.

It is an arithmetic number, because the mean of its divisors is an integer number (11796400).

Almost surely, 2^231209667 is an apocalyptic number.

231209667 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

231209667 is a deficient number, since it is larger than the sum of its proper divisors (146275133).

231209667 is a wasteful number, since it uses less digits than its factorization.

231209667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15384 (or 15378 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 231209667 is about 15205.5801270455. The cubic root of 231209667 is about 613.7648260971.

The spelling of 231209667 in words is "two hundred thirty-one million, two hundred nine thousand, six hundred sixty-seven".