1311432240442 has 4 divisors (see below), whose sum is σ = 1967148360666. Its totient is φ = 655716120220.

The previous prime is 1311432240427. The next prime is 1311432240463. The reversal of 1311432240442 is 2440422341131.

It is a happy number.

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., 1309173044481 + 2259195961 = 1144191^2 + 47531^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327858060109 + ... + 327858060112.

Almost surely, 2^{1311432240442} is an apocalyptic number.

1311432240442 is a deficient number, since it is larger than the sum of its proper divisors (655716120224).

1311432240442 is an equidigital number, since it uses as much as digits as its factorization.

1311432240442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655716120223.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 1311432240442 its reverse (2440422341131), we get a palindrome (3751854581573).

The spelling of 1311432240442 in words is "one trillion, three hundred eleven billion, four hundred thirty-two million, two hundred forty thousand, four hundred forty-two".