51747000142 has 4 divisors (see below), whose sum is σ = 77620500216. Its totient is φ = 25873500070.

The previous prime is 51747000121. The next prime is 51747000191. The reversal of 51747000142 is 24100074715.

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

It is a super-2 number, since 2×51747000142² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12936750034 + ... + 12936750037.

It is an arithmetic number, because the mean of its divisors is an integer number (19405125054).

Almost surely, 2^51747000142 is an apocalyptic number.

51747000142 is a deficient number, since it is larger than the sum of its proper divisors (25873500074).

51747000142 is a wasteful number, since it uses less digits than its factorization.

51747000142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25873500073.

The product of its (nonzero) digits is 7840, while the sum is 31.

Adding to 51747000142 its reverse (24100074715), we get a palindrome (75847074857).

The spelling of 51747000142 in words is "fifty-one billion, seven hundred forty-seven million, one hundred forty-two", and thus it is an aban number.