1731880161 has 12 divisors (see below), whose sum is σ = 2729023440. Its totient is φ = 1049624280.

The previous prime is 1731880141. The next prime is 1731880211. The reversal of 1731880161 is 1610881371.

It is a happy number.

It is not a de Polignac number, because 1731880161 - 2¹³ = 1731871969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1731880141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8746771 + ... + 8746968.

It is an arithmetic number, because the mean of its divisors is an integer number (227418620).

Almost surely, 2^1731880161 is an apocalyptic number.

1731880161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1731880161 is a deficient number, since it is larger than the sum of its proper divisors (997143279).

1731880161 is a wasteful number, since it uses less digits than its factorization.

1731880161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17493756 (or 17493753 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 1731880161 is about 41615.8642947614. The cubic root of 1731880161 is about 1200.8975139732.

It can be divided in two parts, 17318 and 80161, that added together give a palindrome (97479).

The spelling of 1731880161 in words is "one billion, seven hundred thirty-one million, eight hundred eighty thousand, one hundred sixty-one".