1531322012 has 24 divisors (see below), whose sum is σ = 2951824512. Its totient is φ = 689295600.

The previous prime is 1531321999. The next prime is 1531322027. The reversal of 1531322012 is 2102231351.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164414 + ... + 173477.

It is an arithmetic number, because the mean of its divisors is an integer number (122992688).

Almost surely, 2^1531322012 is an apocalyptic number.

It is an amenable number.

1531322012 is a deficient number, since it is larger than the sum of its proper divisors (1420502500).

1531322012 is a wasteful number, since it uses less digits than its factorization.

1531322012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338009 (or 338007 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1531322012 is about 39132.1097310125. The cubic root of 1531322012 is about 1152.6271411253.

Adding to 1531322012 its reverse (2102231351), we get a palindrome (3633553363).

The spelling of 1531322012 in words is "one billion, five hundred thirty-one million, three hundred twenty-two thousand, twelve".