131451205723 has 4 divisors (see below), whose sum is σ = 131563462408. Its totient is φ = 131338949040.

The previous prime is 131451205681. The next prime is 131451205751. The reversal of 131451205723 is 327502154131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327502154131 = 53 ⋅6179285927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131451205723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131451205783) 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, 56126586 + ... + 56128927.

It is an arithmetic number, because the mean of its divisors is an integer number (32890865602).

Almost surely, 2^131451205723 is an apocalyptic number.

131451205723 is a deficient number, since it is larger than the sum of its proper divisors (112256685).

131451205723 is a wasteful number, since it uses less digits than its factorization.

131451205723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112256684.

The product of its (nonzero) digits is 25200, while the sum is 34.

Adding to 131451205723 its reverse (327502154131), we get a palindrome (458953359854).

The spelling of 131451205723 in words is "one hundred thirty-one billion, four hundred fifty-one million, two hundred five thousand, seven hundred twenty-three".