13231671988 has 6 divisors (see below), whose sum is σ = 23155425986. Its totient is φ = 6615835992.

The previous prime is 13231671977. The next prime is 13231671989. The reversal of 13231671988 is 88917613231.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12385909264 + 845762724 = 111292^2 + 29082^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231671989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1653958995 + ... + 1653959002.

Almost surely, 2^13231671988 is an apocalyptic number.

It is an amenable number.

13231671988 is a deficient number, since it is larger than the sum of its proper divisors (9923753998).

13231671988 is a wasteful number, since it uses less digits than its factorization.

13231671988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307918001 (or 3307917999 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

It can be divided in two parts, 132316 and 71988, that added together give a square (204304 = 452²).

The spelling of 13231671988 in words is "thirteen billion, two hundred thirty-one million, six hundred seventy-one thousand, nine hundred eighty-eight".