51326403 has 4 divisors (see below), whose sum is σ = 68435208. Its totient is φ = 34217600.

The previous prime is 51326393. The next prime is 51326411. The reversal of 51326403 is 30462315.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 51326403 - 2⁵ = 51326371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51326413) 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, 8554398 + ... + 8554403.

It is an arithmetic number, because the mean of its divisors is an integer number (17108802).

Almost surely, 2^51326403 is an apocalyptic number.

51326403 is a deficient number, since it is larger than the sum of its proper divisors (17108805).

51326403 is a wasteful number, since it uses less digits than its factorization.

51326403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17108804.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 51326403 is about 7164.2447613129. The cubic root of 51326403 is about 371.6324340791.

Adding to 51326403 its reverse (30462315), we get a palindrome (81788718).

The spelling of 51326403 in words is "fifty-one million, three hundred twenty-six thousand, four hundred three".