131671326361551 has 4 divisors (see below), whose sum is σ = 175561768482072. Its totient is φ = 87780884241032.

The previous prime is 131671326361541. The next prime is 131671326361573. The reversal of 131671326361551 is 155163623176131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131671326361551 - 2¹⁸ = 131671326099407 is a prime.

It is a super-2 number, since 2×131671326361551² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131671326361494 and 131671326361503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131671326361541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21945221060256 + ... + 21945221060261.

It is an arithmetic number, because the mean of its divisors is an integer number (43890442120518).

Almost surely, 2^{131671326361551} is an apocalyptic number.

131671326361551 is a deficient number, since it is larger than the sum of its proper divisors (43890442120521).

131671326361551 is an equidigital number, since it uses as much as digits as its factorization.

131671326361551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43890442120520.

The product of its digits is 2041200, while the sum is 51.

The spelling of 131671326361551 in words is "one hundred thirty-one trillion, six hundred seventy-one billion, three hundred twenty-six million, three hundred sixty-one thousand, five hundred fifty-one".