56432399 has 4 divisors (see below), whose sum is σ = 56480136. Its totient is φ = 56384664.

The previous prime is 56432377. The next prime is 56432407. The reversal of 56432399 is 99323465.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99323465 = 5 ⋅19864693.

It is a cyclic number.

It is not a de Polignac number, because 56432399 - 2¹² = 56428303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56402399) 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, 22049 + ... + 24474.

It is an arithmetic number, because the mean of its divisors is an integer number (14120034).

Almost surely, 2^56432399 is an apocalyptic number.

56432399 is a deficient number, since it is larger than the sum of its proper divisors (47737).

56432399 is a wasteful number, since it uses less digits than its factorization.

56432399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47736.

The product of its digits is 174960, while the sum is 41.

The square root of 56432399 is about 7512.1500916848. The cubic root of 56432399 is about 383.5684147637.

The spelling of 56432399 in words is "fifty-six million, four hundred thirty-two thousand, three hundred ninety-nine".