1531323132 has 12 divisors (see below), whose sum is σ = 3573087336. Its totient is φ = 510441040.

The previous prime is 1531323113. The next prime is 1531323137. The reversal of 1531323132 is 2313231351.

1531323132 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531323137) 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, 63805119 + ... + 63805142.

It is an arithmetic number, because the mean of its divisors is an integer number (297757278).

Almost surely, 2^1531323132 is an apocalyptic number.

1531323132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1531323132 is an abundant number, since it is smaller than the sum of its proper divisors (2041764204).

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

1531323132 is a wasteful number, since it uses less digits than its factorization.

1531323132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127610268 (or 127610266 counting only the distinct ones).

The product of its digits is 1620, while the sum is 24.

The square root of 1531323132 is about 39132.1240415084. The cubic root of 1531323132 is about 1152.6274221335.

Adding to 1531323132 its reverse (2313231351), we get a palindrome (3844554483).

The spelling of 1531323132 in words is "one billion, five hundred thirty-one million, three hundred twenty-three thousand, one hundred thirty-two".