51321425351 has 4 divisors (see below), whose sum is σ = 58653057552. Its totient is φ = 43989793152.

The previous prime is 51321425333. The next prime is 51321425357. The reversal of 51321425351 is 15352412315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51321425351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51321425357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3665816090 + ... + 3665816103.

It is an arithmetic number, because the mean of its divisors is an integer number (14663264388).

Almost surely, 2^51321425351 is an apocalyptic number.

51321425351 is a deficient number, since it is larger than the sum of its proper divisors (7331632201).

51321425351 is an equidigital number, since it uses as much as digits as its factorization.

51321425351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331632200.

The product of its digits is 18000, while the sum is 32.

Adding to 51321425351 its reverse (15352412315), we get a palindrome (66673837666).

The spelling of 51321425351 in words is "fifty-one billion, three hundred twenty-one million, four hundred twenty-five thousand, three hundred fifty-one".