131444251145 has 8 divisors (see below), whose sum is σ = 161580250440. Its totient is φ = 102590634880.

The previous prime is 131444251121. The next prime is 131444251157. The reversal of 131444251145 is 541152444131.

It can be written as a sum of positive squares in 4 ways, for example, as 5487401929 + 125956849216 = 74077^2 + 354904^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131444251145 - 2²⁸ = 131175815689 is a prime.

It is a super-2 number, since 2×131444251145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320595530 + ... + 320595939.

It is an arithmetic number, because the mean of its divisors is an integer number (20197531305).

Almost surely, 2^131444251145 is an apocalyptic number.

It is an amenable number.

131444251145 is a deficient number, since it is larger than the sum of its proper divisors (30135999295).

131444251145 is an equidigital number, since it uses as much as digits as its factorization.

131444251145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641191515.

The product of its digits is 38400, while the sum is 35.

Adding to 131444251145 its reverse (541152444131), we get a palindrome (672596695276).

The spelling of 131444251145 in words is "one hundred thirty-one billion, four hundred forty-four million, two hundred fifty-one thousand, one hundred forty-five".