131513452442 has 4 divisors (see below), whose sum is σ = 197270178666. Its totient is φ = 65756726220.

The previous prime is 131513452409. The next prime is 131513452451. The reversal of 131513452442 is 244254315131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 119903605441 + 11609847001 = 346271^2 + 107749^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 32878363109 + ... + 32878363112.

Almost surely, 2^131513452442 is an apocalyptic number.

131513452442 is a deficient number, since it is larger than the sum of its proper divisors (65756726224).

131513452442 is an equidigital number, since it uses as much as digits as its factorization.

131513452442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65756726223.

The product of its digits is 57600, while the sum is 35.

Adding to 131513452442 its reverse (244254315131), we get a palindrome (375767767573).

The spelling of 131513452442 in words is "one hundred thirty-one billion, five hundred thirteen million, four hundred fifty-two thousand, four hundred forty-two".