2148338261 has 2 divisors, whose sum is σ = 2148338262. Its totient is φ = 2148338260.

The previous prime is 2148338233. The next prime is 2148338279. The reversal of 2148338261 is 1628338412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2115448036 + 32890225 = 45994^2 + 5735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2148338261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2148338201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074169130 + 1074169131.

It is an arithmetic number, because the mean of its divisors is an integer number (1074169131).

Almost surely, 2^2148338261 is an apocalyptic number.

It is an amenable number.

2148338261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2148338261 is an equidigital number, since it uses as much as digits as its factorization.

2148338261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 2148338261 is about 46350.1700212631. The cubic root of 2148338261 is about 1290.3302763886.

The spelling of 2148338261 in words is "two billion, one hundred forty-eight million, three hundred thirty-eight thousand, two hundred sixty-one".