51252515423 has 4 divisors (see below), whose sum is σ = 51284410320. Its totient is φ = 51220620528.

The previous prime is 51252515417. The next prime is 51252515437. The reversal of 51252515423 is 32451525215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51252515423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51252515723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15945038 + ... + 15948251.

It is an arithmetic number, because the mean of its divisors is an integer number (12821102580).

Almost surely, 2^51252515423 is an apocalyptic number.

51252515423 is a deficient number, since it is larger than the sum of its proper divisors (31894897).

51252515423 is a wasteful number, since it uses less digits than its factorization.

51252515423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31894896.

The product of its digits is 60000, while the sum is 35.

The spelling of 51252515423 in words is "fifty-one billion, two hundred fifty-two million, five hundred fifteen thousand, four hundred twenty-three".