51155011133 has 12 divisors (see below), whose sum is σ = 54775587360. Its totient is φ = 47641179816.

The previous prime is 51155011111. The next prime is 51155011147. The reversal of 51155011133 is 33111055115.

It is not a de Polignac number, because 51155011133 - 2¹⁸ = 51154748989 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 (51155511133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320585 + ... + 452862.

It is an arithmetic number, because the mean of its divisors is an integer number (4564632280).

Almost surely, 2^51155011133 is an apocalyptic number.

It is an amenable number.

51155011133 is a deficient number, since it is larger than the sum of its proper divisors (3620576227).

51155011133 is an equidigital number, since it uses as much as digits as its factorization.

51155011133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773584 (or 773525 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 26.

Adding to 51155011133 its reverse (33111055115), we get a palindrome (84266066248).

The spelling of 51155011133 in words is "fifty-one billion, one hundred fifty-five million, eleven thousand, one hundred thirty-three".