51542253155 has 4 divisors (see below), whose sum is σ = 61850703792. Its totient is φ = 41233802520.

The previous prime is 51542253067. The next prime is 51542253181. The reversal of 51542253155 is 55135224515.

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

It is not a de Polignac number, because 51542253155 - 2²⁶ = 51475144291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5154225311 + ... + 5154225320.

It is an arithmetic number, because the mean of its divisors is an integer number (15462675948).

Almost surely, 2^51542253155 is an apocalyptic number.

51542253155 is a deficient number, since it is larger than the sum of its proper divisors (10308450637).

51542253155 is a wasteful number, since it uses less digits than its factorization.

51542253155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10308450636.

The product of its digits is 150000, while the sum is 38.

The spelling of 51542253155 in words is "fifty-one billion, five hundred forty-two million, two hundred fifty-three thousand, one hundred fifty-five".