51542400403 has 8 divisors (see below), whose sum is σ = 55574656928. Its totient is φ = 47519780544.

The previous prime is 51542400373. The next prime is 51542400421. The reversal of 51542400403 is 30400424515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51542400403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51542400433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2398050 + ... + 2419447.

It is an arithmetic number, because the mean of its divisors is an integer number (6946832116).

Almost surely, 2^51542400403 is an apocalyptic number.

51542400403 is a deficient number, since it is larger than the sum of its proper divisors (4032256525).

51542400403 is a wasteful number, since it uses less digits than its factorization.

51542400403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818333.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 51542400403 its reverse (30400424515), we get a palindrome (81942824918).

The spelling of 51542400403 in words is "fifty-one billion, five hundred forty-two million, four hundred thousand, four hundred three".