51302554205421 has 16 divisors (see below), whose sum is σ = 69695354776320. Its totient is φ = 33555752642880.

The previous prime is 51302554205407. The next prime is 51302554205423. The reversal of 51302554205421 is 12450245520315.

It is not a de Polignac number, because 51302554205421 - 2¹³ = 51302554197229 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51302554205421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51302554205423) 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, 5449836 + ... + 11502426.

It is an arithmetic number, because the mean of its divisors is an integer number (4355959673520).

Almost surely, 2^{51302554205421} is an apocalyptic number.

It is an amenable number.

51302554205421 is a deficient number, since it is larger than the sum of its proper divisors (18392800570899).

51302554205421 is a wasteful number, since it uses less digits than its factorization.

51302554205421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6105956.

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 51302554205421 its reverse (12450245520315), we get a palindrome (63752799725736).

The spelling of 51302554205421 in words is "fifty-one trillion, three hundred two billion, five hundred fifty-four million, two hundred five thousand, four hundred twenty-one".