1131314521 has 16 divisors (see below), whose sum is σ = 1224265104. Its totient is φ = 1041424384.

The previous prime is 1131314519. The next prime is 1131314533. The reversal of 1131314521 is 1254131311.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1296 + 1131313225 = 36^2 + 33635^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131314521 - 2¹ = 1131314519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131314492 and 1131314501.

It is not an unprimeable number, because it can be changed into a prime (1131314021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316275 + ... + 319831.

It is an arithmetic number, because the mean of its divisors is an integer number (76516569).

Almost surely, 2^1131314521 is an apocalyptic number.

It is an amenable number.

1131314521 is a deficient number, since it is larger than the sum of its proper divisors (92950583).

1131314521 is a wasteful number, since it uses less digits than its factorization.

1131314521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980.

The product of its digits is 360, while the sum is 22.

The square root of 1131314521 is about 33635.0192656404. The cubic root of 1131314521 is about 1041.9841685107.

Adding to 1131314521 its reverse (1254131311), we get a palindrome (2385445832).

The spelling of 1131314521 in words is "one billion, one hundred thirty-one million, three hundred fourteen thousand, five hundred twenty-one".