1331521422 has 32 divisors (see below), whose sum is σ = 3320158464. Its totient is φ = 345849600.

The previous prime is 1331521361. The next prime is 1331521423. The reversal of 1331521422 is 2241251331.

It is a junction number, because it is equal to n+sod(n) for n = 1331521392 and 1331521401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331521423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1440579 + ... + 1441502.

It is an arithmetic number, because the mean of its divisors is an integer number (103754952).

Almost surely, 2^1331521422 is an apocalyptic number.

1331521422 is an abundant number, since it is smaller than the sum of its proper divisors (1988637042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331521422 is a wasteful number, since it uses less digits than its factorization.

1331521422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882104.

The product of its digits is 1440, while the sum is 24.

The square root of 1331521422 is about 36490.0181145474. The cubic root of 1331521422 is about 1100.1436236709.

Adding to 1331521422 its reverse (2241251331), we get a palindrome (3572772753).

It can be divided in two parts, 1331 and 521422, that added together give a triangular number (522753 = T₁₀₂₂).

The spelling of 1331521422 in words is "one billion, three hundred thirty-one million, five hundred twenty-one thousand, four hundred twenty-two".