2148508421 has 2 divisors, whose sum is σ = 2148508422. Its totient is φ = 2148508420.

The previous prime is 2148508367. The next prime is 2148508463. The reversal of 2148508421 is 1248058412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1294992196 + 853516225 = 35986^2 + 29215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2148508421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2148508121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074254210 + 1074254211.

It is an arithmetic number, because the mean of its divisors is an integer number (1074254211).

Almost surely, 2^2148508421 is an apocalyptic number.

It is an amenable number.

2148508421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2148508421 is an equidigital number, since it uses as much as digits as its factorization.

2148508421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 2148508421 is about 46352.0055768896. The cubic root of 2148508421 is about 1290.3643425328.

The spelling of 2148508421 in words is "two billion, one hundred forty-eight million, five hundred eight thousand, four hundred twenty-one".