231770805671 has 4 divisors (see below), whose sum is σ = 231980934432. Its totient is φ = 231560676912.

The previous prime is 231770805667. The next prime is 231770805689. The reversal of 231770805671 is 176508077132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231770805671 - 2² = 231770805667 is a prime.

It is a super-2 number, since 2×231770805671² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231770805611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105062726 + ... + 105064931.

It is an arithmetic number, because the mean of its divisors is an integer number (57995233608).

Almost surely, 2^231770805671 is an apocalyptic number.

231770805671 is a deficient number, since it is larger than the sum of its proper divisors (210128761).

231770805671 is a wasteful number, since it uses less digits than its factorization.

231770805671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210128760.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 231770805671 in words is "two hundred thirty-one billion, seven hundred seventy million, eight hundred five thousand, six hundred seventy-one".