1331531122 has 4 divisors (see below), whose sum is σ = 1997296686. Its totient is φ = 665765560.

The previous prime is 1331531087. The next prime is 1331531167. The reversal of 1331531122 is 2211351331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1311091681 + 20439441 = 36209^2 + 4521^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1331531093 and 1331531102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332882779 + ... + 332882782.

Almost surely, 2^1331531122 is an apocalyptic number.

1331531122 is a deficient number, since it is larger than the sum of its proper divisors (665765564).

1331531122 is an equidigital number, since it uses as much as digits as its factorization.

1331531122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665765563.

The product of its digits is 540, while the sum is 22.

The square root of 1331531122 is about 36490.1510273663. The cubic root of 1331531122 is about 1100.1462951431.

Adding to 1331531122 its reverse (2211351331), we get a palindrome (3542882453).

The spelling of 1331531122 in words is "one billion, three hundred thirty-one million, five hundred thirty-one thousand, one hundred twenty-two".