56012403 has 4 divisors (see below), whose sum is σ = 74683208. Its totient is φ = 37341600.

The previous prime is 56012371. The next prime is 56012423. The reversal of 56012403 is 30421065.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56012403 - 2⁵ = 56012371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56012403.

It is not an unprimeable number, because it can be changed into a prime (56012423) 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, 9335398 + ... + 9335403.

It is an arithmetic number, because the mean of its divisors is an integer number (18670802).

Almost surely, 2^56012403 is an apocalyptic number.

56012403 is a deficient number, since it is larger than the sum of its proper divisors (18670805).

56012403 is a wasteful number, since it uses less digits than its factorization.

56012403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18670804.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 56012403 is about 7484.1434379627. The cubic root of 56012403 is about 382.6144798093.

Adding to 56012403 its reverse (30421065), we get a palindrome (86433468).

The spelling of 56012403 in words is "fifty-six million, twelve thousand, four hundred three".