51021553001 has 2 divisors, whose sum is σ = 51021553002. Its totient is φ = 51021553000.

The previous prime is 51021552977. The next prime is 51021553153. The reversal of 51021553001 is 10035512015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49595735401 + 1425817600 = 222701^2 + 37760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51021553001 is a prime.

It is not a weakly prime, because it can be changed into another prime (51021553201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25510776500 + 25510776501.

It is an arithmetic number, because the mean of its divisors is an integer number (25510776501).

Almost surely, 2^51021553001 is an apocalyptic number.

It is an amenable number.

51021553001 is a deficient number, since it is larger than the sum of its proper divisors (1).

51021553001 is an equidigital number, since it uses as much as digits as its factorization.

51021553001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The spelling of 51021553001 in words is "fifty-one billion, twenty-one million, five hundred fifty-three thousand, one".