1312516351 has 4 divisors (see below), whose sum is σ = 1315440000. Its totient is φ = 1309592704.

The previous prime is 1312516343. The next prime is 1312516363. The reversal of 1312516351 is 1536152131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1536152131 = 83 ⋅18507857.

It is a cyclic number.

It is not a de Polignac number, because 1312516351 - 2³ = 1312516343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312516451) 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, 1461151 + ... + 1462048.

It is an arithmetic number, because the mean of its divisors is an integer number (328860000).

Almost surely, 2^1312516351 is an apocalyptic number.

1312516351 is a deficient number, since it is larger than the sum of its proper divisors (2923649).

1312516351 is an equidigital number, since it uses as much as digits as its factorization.

1312516351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923648.

The product of its digits is 2700, while the sum is 28.

The square root of 1312516351 is about 36228.6675300100. The cubic root of 1312516351 is about 1094.8843315891.

Adding to 1312516351 its reverse (1536152131), we get a palindrome (2848668482).

The spelling of 1312516351 in words is "one billion, three hundred twelve million, five hundred sixteen thousand, three hundred fifty-one".