1151031313 has 4 divisors (see below), whose sum is σ = 1151135460. Its totient is φ = 1150927168.

The previous prime is 1151031311. The next prime is 1151031317. The reversal of 1151031313 is 3131301511.

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 can be written as a sum of positive squares in 2 ways, for example, as 698703489 + 452327824 = 26433^2 + 21268^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151031313 - 2¹ = 1151031311 is a prime.

It is a super-3 number, since 3×1151031313³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151031311) 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, 33220 + ... + 58357.

It is an arithmetic number, because the mean of its divisors is an integer number (287783865).

Almost surely, 2^1151031313 is an apocalyptic number.

It is an amenable number.

1151031313 is a deficient number, since it is larger than the sum of its proper divisors (104147).

1151031313 is an equidigital number, since it uses as much as digits as its factorization.

1151031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104146.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 1151031313 is about 33926.8523886316. The cubic root of 1151031313 is about 1048.0026468015.

Adding to 1151031313 its reverse (3131301511), we get a palindrome (4282332824).

The spelling of 1151031313 in words is "one billion, one hundred fifty-one million, thirty-one thousand, three hundred thirteen".