131245431742 has 4 divisors (see below), whose sum is σ = 196868147616. Its totient is φ = 65622715870.

The previous prime is 131245431703. The next prime is 131245431767. The reversal of 131245431742 is 247134542131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 247134542131 = 1213 ⋅203738287.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32811357934 + ... + 32811357937.

It is an arithmetic number, because the mean of its divisors is an integer number (49217036904).

Almost surely, 2^131245431742 is an apocalyptic number.

131245431742 is a deficient number, since it is larger than the sum of its proper divisors (65622715874).

131245431742 is an equidigital number, since it uses as much as digits as its factorization.

131245431742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65622715873.

The product of its digits is 80640, while the sum is 37.

Adding to 131245431742 its reverse (247134542131), we get a palindrome (378379973873).

The spelling of 131245431742 in words is "one hundred thirty-one billion, two hundred forty-five million, four hundred thirty-one thousand, seven hundred forty-two".