1351111531 has 12 divisors (see below), whose sum is σ = 1697265136. Its totient is φ = 1052813520.

The previous prime is 1351111529. The next prime is 1351111561.

1351111531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1351111531 - 2¹ = 1351111529 is a prime.

It is a super-2 number, since 2×1351111531² = 3651004738402327922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1351111501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 796740 + ... + 798433.

Almost surely, 2^1351111531 is an apocalyptic number.

1351111531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1351111531 is a deficient number, since it is larger than the sum of its proper divisors (346153605).

1351111531 is a wasteful number, since it uses less digits than its factorization.

1351111531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595202 (or 1595191 counting only the distinct ones).

The product of its digits is 225, while the sum is 22.

The square root of 1351111531 is about 36757.4690505209. The cubic root of 1351111531 is about 1105.5126934344.

The spelling of 1351111531 in words is "one billion, three hundred fifty-one million, one hundred eleven thousand, five hundred thirty-one".