1355131511 has 4 divisors (see below), whose sum is σ = 1355214672. Its totient is φ = 1355048352.

The previous prime is 1355131483. The next prime is 1355131537. The reversal of 1355131511 is 1151315531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1355131511 - 2¹⁰ = 1355130487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355121511) 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, 8210 + ... + 52703.

It is an arithmetic number, because the mean of its divisors is an integer number (338803668).

Almost surely, 2^1355131511 is an apocalyptic number.

1355131511 is a deficient number, since it is larger than the sum of its proper divisors (83161).

1355131511 is an equidigital number, since it uses as much as digits as its factorization.

1355131511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83160.

The product of its digits is 1125, while the sum is 26.

The square root of 1355131511 is about 36812.1109283344. The cubic root of 1355131511 is about 1106.6080233457.

The spelling of 1355131511 in words is "one billion, three hundred fifty-five million, one hundred thirty-one thousand, five hundred eleven".