51472148521 has 2 divisors, whose sum is σ = 51472148522. Its totient is φ = 51472148520.

The previous prime is 51472148509. The next prime is 51472148543. The reversal of 51472148521 is 12584127415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37894072896 + 13578075625 = 194664^2 + 116525^2 .

It is a cyclic number.

It is not a de Polignac number, because 51472148521 - 2⁷ = 51472148393 is a prime.

It is not a weakly prime, because it can be changed into another prime (51472148551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25736074260 + 25736074261.

It is an arithmetic number, because the mean of its divisors is an integer number (25736074261).

Almost surely, 2^51472148521 is an apocalyptic number.

It is an amenable number.

51472148521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51472148521 is an equidigital number, since it uses as much as digits as its factorization.

51472148521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 40.

The spelling of 51472148521 in words is "fifty-one billion, four hundred seventy-two million, one hundred forty-eight thousand, five hundred twenty-one".