1531400432 has 20 divisors (see below), whose sum is σ = 2970835896. Its totient is φ = 764733120.

The previous prime is 1531400413. The next prime is 1531400473. The reversal of 1531400432 is 2340041351.

It is a junction number, because it is equal to n+sod(n) for n = 1531400398 and 1531400407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47294 + ... + 72797.

Almost surely, 2^1531400432 is an apocalyptic number.

It is an amenable number.

1531400432 is a deficient number, since it is larger than the sum of its proper divisors (1439435464).

1531400432 is a wasteful number, since it uses less digits than its factorization.

1531400432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120896 (or 120890 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1531400432 is about 39133.1117086285. Note that the first 3 decimals coincide. The cubic root of 1531400432 is about 1152.6468163856.

Adding to 1531400432 its reverse (2340041351), we get a palindrome (3871441783).

The spelling of 1531400432 in words is "one billion, five hundred thirty-one million, four hundred thousand, four hundred thirty-two".