51420434351 has 16 divisors (see below), whose sum is σ = 60696359808. Its totient is φ = 42945487200.

The previous prime is 51420434333. The next prime is 51420434389. The reversal of 51420434351 is 15343402415.

It is not a de Polignac number, because 51420434351 - 2¹⁰ = 51420433327 is a prime.

It is a super-2 number, since 2×51420434351² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51420434651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821921 + ... + 882266.

It is an arithmetic number, because the mean of its divisors is an integer number (3793522488).

Almost surely, 2^51420434351 is an apocalyptic number.

51420434351 is a deficient number, since it is larger than the sum of its proper divisors (9275925457).

51420434351 is a wasteful number, since it uses less digits than its factorization.

51420434351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704422.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 51420434351 its reverse (15343402415), we get a palindrome (66763836766).

The spelling of 51420434351 in words is "fifty-one billion, four hundred twenty million, four hundred thirty-four thousand, three hundred fifty-one".