210148261 has 2 divisors, whose sum is σ = 210148262. Its totient is φ = 210148260.

The previous prime is 210148249. The next prime is 210148277. The reversal of 210148261 is 162841012.

210148261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209699361 + 448900 = 14481^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 210148261 - 2⁵ = 210148229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210148241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105074130 + 105074131.

It is an arithmetic number, because the mean of its divisors is an integer number (105074131).

Almost surely, 2^210148261 is an apocalyptic number.

It is an amenable number.

210148261 is a deficient number, since it is larger than the sum of its proper divisors (1).

210148261 is an equidigital number, since it uses as much as digits as its factorization.

210148261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 210148261 is about 14496.4913341125. The cubic root of 210148261 is about 594.5320436104.

Adding to 210148261 its reverse (162841012), we get a palindrome (372989273).

The spelling of 210148261 in words is "two hundred ten million, one hundred forty-eight thousand, two hundred sixty-one".