51402245123 has 4 divisors (see below), whose sum is σ = 51436265328. Its totient is φ = 51368224920.

The previous prime is 51402245117. The next prime is 51402245173. The reversal of 51402245123 is 32154220415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32154220415 = 5 ⋅6430844083.

It is a cyclic number.

It is not a de Polignac number, because 51402245123 - 2²⁰ = 51401196547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402245113) 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, 17007836 + ... + 17010857.

It is an arithmetic number, because the mean of its divisors is an integer number (12859066332).

Almost surely, 2^51402245123 is an apocalyptic number.

51402245123 is a deficient number, since it is larger than the sum of its proper divisors (34020205).

51402245123 is a wasteful number, since it uses less digits than its factorization.

51402245123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34020204.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 51402245123 its reverse (32154220415), we get a palindrome (83556465538).

The spelling of 51402245123 in words is "fifty-one billion, four hundred two million, two hundred forty-five thousand, one hundred twenty-three".