51023112403 has 4 divisors (see below), whose sum is σ = 51024715840. Its totient is φ = 51021508968.

The previous prime is 51023112377. The next prime is 51023112409. The reversal of 51023112403 is 30421132015.

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 51023112403 - 2¹³ = 51023104211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51023112409) 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, 753000 + ... + 817957.

It is an arithmetic number, because the mean of its divisors is an integer number (12756178960).

Almost surely, 2^51023112403 is an apocalyptic number.

51023112403 is a deficient number, since it is larger than the sum of its proper divisors (1603437).

51023112403 is a wasteful number, since it uses less digits than its factorization.

51023112403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603436.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 51023112403 its reverse (30421132015), we get a palindrome (81444244418).

The spelling of 51023112403 in words is "fifty-one billion, twenty-three million, one hundred twelve thousand, four hundred three".