131622341781 has 36 divisors (see below), whose sum is σ = 213105223968. Its totient is φ = 70773285888.

The previous prime is 131622341737. The next prime is 131622341819. The reversal of 131622341781 is 187143226131.

It is not a de Polignac number, because 131622341781 - 2¹¹ = 131622339733 is a prime.

It is a super-2 number, since 2×131622341781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131622341581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28261005 + ... + 28265661.

Almost surely, 2^131622341781 is an apocalyptic number.

It is an amenable number.

131622341781 is a deficient number, since it is larger than the sum of its proper divisors (81482882187).

131622341781 is an frugal number, since it uses more digits than its factorization.

131622341781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358 (or 4684 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The spelling of 131622341781 in words is "one hundred thirty-one billion, six hundred twenty-two million, three hundred forty-one thousand, seven hundred eighty-one".