51336403 has 4 divisors (see below), whose sum is σ = 52992448. Its totient is φ = 49680360.

The previous prime is 51336401. The next prime is 51336419. The reversal of 51336403 is 30463315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30463315 = 5 ⋅6092663.

It is a cyclic number.

It is not a de Polignac number, because 51336403 - 2¹ = 51336401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51336401) 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, 827976 + ... + 828037.

It is an arithmetic number, because the mean of its divisors is an integer number (13248112).

Almost surely, 2^51336403 is an apocalyptic number.

51336403 is a deficient number, since it is larger than the sum of its proper divisors (1656045).

51336403 is a wasteful number, since it uses less digits than its factorization.

51336403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656044.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 51336403 is about 7164.9426375931. The cubic root of 51336403 is about 371.6565677465.

Adding to 51336403 its reverse (30463315), we get a palindrome (81799718).

The spelling of 51336403 in words is "fifty-one million, three hundred thirty-six thousand, four hundred three".