51023020102 has 4 divisors (see below), whose sum is σ = 76534530156. Its totient is φ = 25511510050.

The previous prime is 51023020079. The next prime is 51023020171. The reversal of 51023020102 is 20102032015.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755755024 + ... + 12755755027.

It is an arithmetic number, because the mean of its divisors is an integer number (19133632539).

Almost surely, 2^51023020102 is an apocalyptic number.

51023020102 is a deficient number, since it is larger than the sum of its proper divisors (25511510054).

51023020102 is a wasteful number, since it uses less digits than its factorization.

51023020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25511510053.

The product of its (nonzero) digits is 120, while the sum is 16.

Adding to 51023020102 its reverse (20102032015), we get a palindrome (71125052117).

The spelling of 51023020102 in words is "fifty-one billion, twenty-three million, twenty thousand, one hundred two".