51222127555 has 4 divisors (see below), whose sum is σ = 61466553072. Its totient is φ = 40977702040.

The previous prime is 51222127487. The next prime is 51222127571. The reversal of 51222127555 is 55572122215.

It is a happy number.

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

It is not a de Polignac number, because 51222127555 - 2¹³ = 51222119363 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5122212751 + ... + 5122212760.

It is an arithmetic number, because the mean of its divisors is an integer number (15366638268).

Almost surely, 2^51222127555 is an apocalyptic number.

51222127555 is a deficient number, since it is larger than the sum of its proper divisors (10244425517).

51222127555 is a wasteful number, since it uses less digits than its factorization.

51222127555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10244425516.

The product of its digits is 70000, while the sum is 37.

The spelling of 51222127555 in words is "fifty-one billion, two hundred twenty-two million, one hundred twenty-seven thousand, five hundred fifty-five".