1351135231 has 4 divisors (see below), whose sum is σ = 1430613792. Its totient is φ = 1271656672.

The previous prime is 1351135211. The next prime is 1351135243. The reversal of 1351135231 is 1325311531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1325311531 = 547 ⋅2422873.

It is a cyclic number.

It is not a de Polignac number, because 1351135231 - 2¹⁷ = 1351004159 is a prime.

It is a super-2 number, since 2×1351135231² = 3651132824898846722, 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 = 1351135196 and 1351135205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351135211) 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, 39739255 + ... + 39739288.

It is an arithmetic number, because the mean of its divisors is an integer number (357653448).

Almost surely, 2^1351135231 is an apocalyptic number.

1351135231 is a deficient number, since it is larger than the sum of its proper divisors (79478561).

1351135231 is an equidigital number, since it uses as much as digits as its factorization.

1351135231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79478560.

The product of its digits is 1350, while the sum is 25.

The square root of 1351135231 is about 36757.7914325657. The cubic root of 1351135231 is about 1105.5191573710.

Adding to 1351135231 its reverse (1325311531), we get a palindrome (2676446762).

The spelling of 1351135231 in words is "one billion, three hundred fifty-one million, one hundred thirty-five thousand, two hundred thirty-one".