231649327 has 32 divisors (see below), whose sum is σ = 304359552. Its totient is φ = 171085824.

The previous prime is 231649309. The next prime is 231649331. The reversal of 231649327 is 723946132.

It is not a de Polignac number, because 231649327 - 2¹⁹ = 231125039 is a prime.

It is a super-2 number, since 2×231649327² = 107322821399105858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231649337) 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, 211393 + ... + 212485.

It is an arithmetic number, because the mean of its divisors is an integer number (9511236).

Almost surely, 2^231649327 is an apocalyptic number.

231649327 is a deficient number, since it is larger than the sum of its proper divisors (72710225).

231649327 is a wasteful number, since it uses less digits than its factorization.

231649327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267.

The product of its digits is 54432, while the sum is 37.

The square root of 231649327 is about 15220.0304533204. The cubic root of 231649327 is about 614.1536174816.

The spelling of 231649327 in words is "two hundred thirty-one million, six hundred forty-nine thousand, three hundred twenty-seven".