1351311271 has 4 divisors (see below), whose sum is σ = 1351454544. Its totient is φ = 1351168000.

The previous prime is 1351311257. The next prime is 1351311277. The reversal of 1351311271 is 1721131531.

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 1351311271 - 2¹⁷ = 1351180199 is a prime.

It is a super-2 number, since 2×1351311271² = 3652084302263270882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351311277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56410 + ... + 76711.

It is an arithmetic number, because the mean of its divisors is an integer number (337863636).

Almost surely, 2^1351311271 is an apocalyptic number.

1351311271 is a deficient number, since it is larger than the sum of its proper divisors (143273).

1351311271 is a wasteful number, since it uses less digits than its factorization.

1351311271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143272.

The product of its digits is 630, while the sum is 25.

The square root of 1351311271 is about 36760.1859489312. The cubic root of 1351311271 is about 1105.5671681441.

The spelling of 1351311271 in words is "one billion, three hundred fifty-one million, three hundred eleven thousand, two hundred seventy-one".