51102420014 has 4 divisors (see below), whose sum is σ = 76653630024. Its totient is φ = 25551210006.

The previous prime is 51102420013. The next prime is 51102420037. The reversal of 51102420014 is 41002420115.

It is a happy number.

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

It is a super-2 number, since 2×51102420014² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51102420013) 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 as a sum of consecutive naturals, namely, 12775605002 + ... + 12775605005.

It is an arithmetic number, because the mean of its divisors is an integer number (19163407506).

Almost surely, 2^51102420014 is an apocalyptic number.

51102420014 is a deficient number, since it is larger than the sum of its proper divisors (25551210010).

51102420014 is a wasteful number, since it uses less digits than its factorization.

51102420014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25551210009.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 51102420014 its reverse (41002420115), we get a palindrome (92104840129).

The spelling of 51102420014 in words is "fifty-one billion, one hundred two million, four hundred twenty thousand, fourteen".