231101997 has 32 divisors (see below), whose sum is σ = 377011200. Its totient is φ = 122974848.

The previous prime is 231101989. The next prime is 231102017. The reversal of 231101997 is 799101132.

It is not a de Polignac number, because 231101997 - 2³ = 231101989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101597) 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, 18633 + ... + 28449.

It is an arithmetic number, because the mean of its divisors is an integer number (11781600).

Almost surely, 2^231101997 is an apocalyptic number.

It is an amenable number.

231101997 is a deficient number, since it is larger than the sum of its proper divisors (145909203).

231101997 is a wasteful number, since it uses less digits than its factorization.

231101997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9905.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 231101997 is about 15202.0392382075. The cubic root of 231101997 is about 613.6695383865.

The spelling of 231101997 in words is "two hundred thirty-one million, one hundred one thousand, nine hundred ninety-seven".