131308650722 has 18 divisors (see below), whose sum is σ = 199270124193. Its totient is φ = 64894087984.

The previous prime is 131308650719. The next prime is 131308650749. The reversal of 131308650722 is 227056803131.

It can be written as a sum of positive squares in 2 ways, for example, as 117375445201 + 13933205521 = 342601^2 + 118039^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=256231.

It is a super-2 number, since 2×131308650722² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45607679 + ... + 45610557.

Almost surely, 2^131308650722 is an apocalyptic number.

131308650722 is a deficient number, since it is larger than the sum of its proper divisors (67961473471).

131308650722 is an frugal number, since it uses more digits than its factorization.

131308650722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5938 (or 2970 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 131308650722 in words is "one hundred thirty-one billion, three hundred eight million, six hundred fifty thousand, seven hundred twenty-two".