231661075 has 12 divisors (see below), whose sum is σ = 287464240. Its totient is φ = 185196960.

The previous prime is 231661063. The next prime is 231661117. The reversal of 231661075 is 570166132.

It is not a de Polignac number, because 231661075 - 2¹¹ = 231659027 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48442 + ... + 53008.

Almost surely, 2^231661075 is an apocalyptic number.

231661075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231661075 is a deficient number, since it is larger than the sum of its proper divisors (55803165).

231661075 is a wasteful number, since it uses less digits than its factorization.

231661075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606 (or 6601 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 231661075 is about 15220.4163872083. The cubic root of 231661075 is about 614.1639994885.

The spelling of 231661075 in words is "two hundred thirty-one million, six hundred sixty-one thousand, seventy-five".