131570772173 has 4 divisors (see below), whose sum is σ = 131600336448. Its totient is φ = 131541207900.

The previous prime is 131570772169. The next prime is 131570772181. The reversal of 131570772173 is 371277075131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371277075131 = 576391 ⋅644141.

It is a cyclic number.

It is not a de Polignac number, because 131570772173 - 2² = 131570772169 is a prime.

It is a super-2 number, since 2×131570772173² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131570772103) 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 3 ways as a sum of consecutive naturals, for example, 14775461 + ... + 14784362.

It is an arithmetic number, because the mean of its divisors is an integer number (32900084112).

Almost surely, 2^131570772173 is an apocalyptic number.

It is an amenable number.

131570772173 is a deficient number, since it is larger than the sum of its proper divisors (29564275).

131570772173 is an equidigital number, since it uses as much as digits as its factorization.

131570772173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29564274.

The product of its (nonzero) digits is 216090, while the sum is 44.

The spelling of 131570772173 in words is "one hundred thirty-one billion, five hundred seventy million, seven hundred seventy-two thousand, one hundred seventy-three".