1311442051 has 4 divisors (see below), whose sum is σ = 1312712632. Its totient is φ = 1310171472.

The previous prime is 1311442049. The next prime is 1311442057. The reversal of 1311442051 is 1502441131.

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 1311442051 - 2¹ = 1311442049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311442057) 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, 633741 + ... + 635806.

It is an arithmetic number, because the mean of its divisors is an integer number (328178158).

Almost surely, 2^1311442051 is an apocalyptic number.

1311442051 is a deficient number, since it is larger than the sum of its proper divisors (1270581).

1311442051 is a wasteful number, since it uses less digits than its factorization.

1311442051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270580.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1311442051 is about 36213.8378385942. The cubic root of 1311442051 is about 1094.5855276161.

Adding to 1311442051 its reverse (1502441131), we get a palindrome (2813883182).

The spelling of 1311442051 in words is "one billion, three hundred eleven million, four hundred forty-two thousand, fifty-one".