1371312431 has 4 divisors (see below), whose sum is σ = 1372484664. Its totient is φ = 1370140200.

The previous prime is 1371312401. The next prime is 1371312433. The reversal of 1371312431 is 1342131731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342131731 = 163 ⋅8233937.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1371312431 is a prime.

It is a super-2 number, since 2×1371312431² = 3760995566830259522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1371312431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371312433) 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, 584360 + ... + 586701.

It is an arithmetic number, because the mean of its divisors is an integer number (343121166).

Almost surely, 2^1371312431 is an apocalyptic number.

1371312431 is a deficient number, since it is larger than the sum of its proper divisors (1172233).

1371312431 is a wasteful number, since it uses less digits than its factorization.

1371312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172232.

The product of its digits is 1512, while the sum is 26.

The square root of 1371312431 is about 37031.2358826977. The cubic root of 1371312431 is about 1110.9950849953.

The spelling of 1371312431 in words is "one billion, three hundred seventy-one million, three hundred twelve thousand, four hundred thirty-one".