1231522132 has 6 divisors (see below), whose sum is σ = 2155163738. Its totient is φ = 615761064.

The previous prime is 1231522111. The next prime is 1231522133. The reversal of 1231522132 is 2312251321.

It can be written as a sum of positive squares in only one way, i.e., 923308996 + 308213136 = 30386^2 + 17556^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231522133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153940263 + ... + 153940270.

Almost surely, 2^1231522132 is an apocalyptic number.

It is an amenable number.

1231522132 is a deficient number, since it is larger than the sum of its proper divisors (923641606).

1231522132 is a wasteful number, since it uses less digits than its factorization.

1231522132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307880537 (or 307880535 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 1231522132 is about 35093.0496252463. The cubic root of 1231522132 is about 1071.8830590582.

Adding to 1231522132 its reverse (2312251321), we get a palindrome (3543773453).

The spelling of 1231522132 in words is "one billion, two hundred thirty-one million, five hundred twenty-two thousand, one hundred thirty-two".