1671531223 has 4 divisors (see below), whose sum is σ = 1681540560. Its totient is φ = 1661521888.

The previous prime is 1671531181. The next prime is 1671531283. The reversal of 1671531223 is 3221351761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3221351761 = 83 ⋅38811467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671531223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671531283) 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, 5004418 + ... + 5004751.

It is an arithmetic number, because the mean of its divisors is an integer number (420385140).

Almost surely, 2^1671531223 is an apocalyptic number.

1671531223 is a deficient number, since it is larger than the sum of its proper divisors (10009337).

1671531223 is a wasteful number, since it uses less digits than its factorization.

1671531223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10009336.

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

The square root of 1671531223 is about 40884.3640405473. The cubic root of 1671531223 is about 1186.7834949031.

Adding to 1671531223 its reverse (3221351761), we get a palindrome (4892882984).

The spelling of 1671531223 in words is "one billion, six hundred seventy-one million, five hundred thirty-one thousand, two hundred twenty-three".