8131319450 has 24 divisors (see below), whose sum is σ = 15171994332. Its totient is φ = 3242261120.

The previous prime is 8131319431. The next prime is 8131319491. The reversal of 8131319450 is 549131318.

It can be written as a sum of positive squares in 6 ways, for example, as 3667876969 + 4463442481 = 60563^2 + 66809^2 .

It is a super-2 number, since 2×8131319450² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 8131319450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240659 + ... + 272358.

Almost surely, 2^8131319450 is an apocalyptic number.

8131319450 is a deficient number, since it is larger than the sum of its proper divisors (7040674882).

8131319450 is a wasteful number, since it uses less digits than its factorization.

8131319450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513346 (or 513341 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 8131319450 is about 90173.8290747376. The cubic root of 8131319450 is about 2010.8839498745.

The spelling of 8131319450 in words is "eight billion, one hundred thirty-one million, three hundred nineteen thousand, four hundred fifty".