131345421141551 has 4 divisors (see below), whose sum is σ = 134548967998704. Its totient is φ = 128141874284400.

The previous prime is 131345421141527. The next prime is 131345421141601. The reversal of 131345421141551 is 155141124543131.

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 131345421141551 - 2³⁸ = 131070543234607 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 3203546857111 = 131345421141551 / (1 + 3 + 1 + 3 + 4 + 5 + 4 + 2 + 1 + 1 + 4 + 1 + 5 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131345421141499 and 131345421141508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131345421141751) 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, 1601773428515 + ... + 1601773428596.

It is an arithmetic number, because the mean of its divisors is an integer number (33637241999676).

Almost surely, 2^{131345421141551} is an apocalyptic number.

131345421141551 is a deficient number, since it is larger than the sum of its proper divisors (3203546857153).

131345421141551 is an equidigital number, since it uses as much as digits as its factorization.

131345421141551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203546857152.

The product of its digits is 144000, while the sum is 41.

Adding to 131345421141551 its reverse (155141124543131), we get a palindrome (286486545684682).

The spelling of 131345421141551 in words is "one hundred thirty-one trillion, three hundred forty-five billion, four hundred twenty-one million, one hundred forty-one thousand, five hundred fifty-one".