8131319508 has 48 divisors (see below), whose sum is σ = 20562752000. Its totient is φ = 2486001024.

The previous prime is 8131319491. The next prime is 8131319527. The reversal of 8131319508 is 8059131318.

It is a super-2 number, since 2×8131319508² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141508 + ... + 190491.

Almost surely, 2^8131319508 is an apocalyptic number.

It is an amenable number.

8131319508 is an abundant number, since it is smaller than the sum of its proper divisors (12431432492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8131319508 is a wasteful number, since it uses less digits than its factorization.

8131319508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332176 (or 332174 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 8131319508 is about 90173.8293963387. The cubic root of 8131319508 is about 2010.8839546557.

The spelling of 8131319508 in words is "eight billion, one hundred thirty-one million, three hundred nineteen thousand, five hundred eight".