51345722573 has 4 divisors (see below), whose sum is σ = 51357119520. Its totient is φ = 51334325628.

The previous prime is 51345722563. The next prime is 51345722609. The reversal of 51345722573 is 37522754315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51345722573 - 2⁸ = 51345722317 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 (51345722503) 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, 5691713 + ... + 5700726.

It is an arithmetic number, because the mean of its divisors is an integer number (12839279880).

Almost surely, 2^51345722573 is an apocalyptic number.

It is an amenable number.

51345722573 is a deficient number, since it is larger than the sum of its proper divisors (11396947).

51345722573 is a wasteful number, since it uses less digits than its factorization.

51345722573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11396946.

The product of its digits is 882000, while the sum is 44.

The spelling of 51345722573 in words is "fifty-one billion, three hundred forty-five million, seven hundred twenty-two thousand, five hundred seventy-three".