1312551131 has 4 divisors (see below), whose sum is σ = 1324818072. Its totient is φ = 1300284192.

The previous prime is 1312551101. The next prime is 1312551151. The reversal of 1312551131 is 1311552131.

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 1312551131 - 2¹⁴ = 1312534747 is a prime.

It is a super-2 number, since 2×1312551131² = 3445580942978758322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312551097 and 1312551106.

It is not an unprimeable number, because it can be changed into a prime (1312551101) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6133310 + ... + 6133523.

It is an arithmetic number, because the mean of its divisors is an integer number (331204518).

Almost surely, 2^1312551131 is an apocalyptic number.

1312551131 is a deficient number, since it is larger than the sum of its proper divisors (12266941).

1312551131 is a wasteful number, since it uses less digits than its factorization.

1312551131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12266940.

The product of its digits is 450, while the sum is 23.

The square root of 1312551131 is about 36229.1475334433. The cubic root of 1312551131 is about 1094.8940025139.

The spelling of 1312551131 in words is "one billion, three hundred twelve million, five hundred fifty-one thousand, one hundred thirty-one".