51420000403 has 4 divisors (see below), whose sum is σ = 51420515328. Its totient is φ = 51419485480.

The previous prime is 51420000389. The next prime is 51420000481. The reversal of 51420000403 is 30400002415.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51420000403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51420003403) 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, 54163 + ... + 325228.

It is an arithmetic number, because the mean of its divisors is an integer number (12855128832).

Almost surely, 2^51420000403 is an apocalyptic number.

51420000403 is a deficient number, since it is larger than the sum of its proper divisors (514925).

51420000403 is a wasteful number, since it uses less digits than its factorization.

51420000403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514924.

The product of its (nonzero) digits is 480, while the sum is 19.

Adding to 51420000403 its reverse (30400002415), we get a palindrome (81820002818).

The spelling of 51420000403 in words is "fifty-one billion, four hundred twenty million, four hundred three", and thus it is an aban number.