51574122511 has 4 divisors (see below), whose sum is σ = 52968017752. Its totient is φ = 50180227272.

The previous prime is 51574122449. The next prime is 51574122539. The reversal of 51574122511 is 11522147515.

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 51574122511 - 2²⁷ = 51439904783 is a prime.

It is a super-2 number, since 2×51574122511² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51574122571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696947565 + ... + 696947638.

It is an arithmetic number, because the mean of its divisors is an integer number (13242004438).

Almost surely, 2^51574122511 is an apocalyptic number.

51574122511 is a deficient number, since it is larger than the sum of its proper divisors (1393895241).

51574122511 is a wasteful number, since it uses less digits than its factorization.

51574122511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393895240.

The product of its digits is 14000, while the sum is 34.

The spelling of 51574122511 in words is "fifty-one billion, five hundred seventy-four million, one hundred twenty-two thousand, five hundred eleven".