51542253133 has 6 divisors (see below), whose sum is σ = 59957314926. Its totient is φ = 44179074072.

The previous prime is 51542253067. The next prime is 51542253181. The reversal of 51542253133 is 33135224515.

It can be written as a sum of positive squares in only one way, i.e., 30696091209 + 20846161924 = 175203^2 + 144382^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51542253133 is a prime.

It is a super-3 number, since 3×51542253133³ (a number of 33 digits) contains 333 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 (51542253733) 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 5 ways as a sum of consecutive naturals, for example, 525941310 + ... + 525941407.

It is an arithmetic number, because the mean of its divisors is an integer number (9992885821).

Almost surely, 2^51542253133 is an apocalyptic number.

It is an amenable number.

51542253133 is a deficient number, since it is larger than the sum of its proper divisors (8415061793).

51542253133 is a wasteful number, since it uses less digits than its factorization.

51542253133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051882731 (or 1051882724 counting only the distinct ones).

The product of its digits is 54000, while the sum is 34.

Adding to 51542253133 its reverse (33135224515), we get a palindrome (84677477648).

The spelling of 51542253133 in words is "fifty-one billion, five hundred forty-two million, two hundred fifty-three thousand, one hundred thirty-three".