51402510123 has 4 divisors (see below), whose sum is σ = 68536680168. Its totient is φ = 34268340080.

The previous prime is 51402510083. The next prime is 51402510143. The reversal of 51402510123 is 32101520415.

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 51402510123 - 2²⁰ = 51401461547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51402510093 and 51402510102.

It is not an unprimeable number, because it can be changed into a prime (51402510143) 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, 8567085018 + ... + 8567085023.

It is an arithmetic number, because the mean of its divisors is an integer number (17134170042).

Almost surely, 2^51402510123 is an apocalyptic number.

51402510123 is a deficient number, since it is larger than the sum of its proper divisors (17134170045).

51402510123 is a wasteful number, since it uses less digits than its factorization.

51402510123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17134170044.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 51402510123 in words is "fifty-one billion, four hundred two million, five hundred ten thousand, one hundred twenty-three".