1521131432 has 16 divisors (see below), whose sum is σ = 2950470900. Its totient is φ = 734339200.

The previous prime is 1521131419. The next prime is 1521131459. The reversal of 1521131432 is 2341311251.

It can be written as a sum of positive squares in 2 ways, for example, as 1519908196 + 1223236 = 38986^2 + 1106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1521131398 and 1521131407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278069 + ... + 3278532.

Almost surely, 2^1521131432 is an apocalyptic number.

It is an amenable number.

1521131432 is a deficient number, since it is larger than the sum of its proper divisors (1429339468).

1521131432 is a wasteful number, since it uses less digits than its factorization.

1521131432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556636 (or 6556632 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 1521131432 is about 39001.6849892412. The cubic root of 1521131432 is about 1150.0646295121.

Adding to 1521131432 its reverse (2341311251), we get a palindrome (3862442683).

The spelling of 1521131432 in words is "one billion, five hundred twenty-one million, one hundred thirty-one thousand, four hundred thirty-two".