51514355021 has 2 divisors, whose sum is σ = 51514355022. Its totient is φ = 51514355020.

The previous prime is 51514354967. The next prime is 51514355023. The reversal of 51514355021 is 12055341515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29244762121 + 22269592900 = 171011^2 + 149230^2 .

It is a cyclic number.

It is not a de Polignac number, because 51514355021 - 2²² = 51510160717 is a prime.

Together with 51514355023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51514355023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25757177510 + 25757177511.

It is an arithmetic number, because the mean of its divisors is an integer number (25757177511).

Almost surely, 2^51514355021 is an apocalyptic number.

It is an amenable number.

51514355021 is a deficient number, since it is larger than the sum of its proper divisors (1).

51514355021 is an equidigital number, since it uses as much as digits as its factorization.

51514355021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 51514355021 its reverse (12055341515), we get a palindrome (63569696536).

The spelling of 51514355021 in words is "fifty-one billion, five hundred fourteen million, three hundred fifty-five thousand, twenty-one".