51224042215 has 4 divisors (see below), whose sum is σ = 61468850664. Its totient is φ = 40979233768.

The previous prime is 51224042197. The next prime is 51224042263.

It is a happy number.

51224042215 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 51224042215 - 2⁵ = 51224042183 is a prime.

It is a Duffinian number.

It is a congruent 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, 5122404217 + ... + 5122404226.

It is an arithmetic number, because the mean of its divisors is an integer number (15367212666).

Almost surely, 2^51224042215 is an apocalyptic number.

51224042215 is a deficient number, since it is larger than the sum of its proper divisors (10244808449).

51224042215 is a wasteful number, since it uses less digits than its factorization.

51224042215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10244808448.

The product of its (nonzero) digits is 6400, while the sum is 28.

It can be divided in two parts, 512240 and 42215, that added together give a palindrome (554455).

The spelling of 51224042215 in words is "fifty-one billion, two hundred twenty-four million, forty-two thousand, two hundred fifteen".