2153238281 has 2 divisors, whose sum is σ = 2153238282. Its totient is φ = 2153238280.

The previous prime is 2153238259. The next prime is 2153238317. The reversal of 2153238281 is 1828323512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1961692681 + 191545600 = 44291^2 + 13840^2 .

It is a cyclic number.

It is not a de Polignac number, because 2153238281 - 2¹⁰ = 2153237257 is a prime.

It is a super-2 number, since 2×2153238281² = 9272870189527669922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2153238481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076619140 + 1076619141.

It is an arithmetic number, because the mean of its divisors is an integer number (1076619141).

Almost surely, 2^2153238281 is an apocalyptic number.

It is an amenable number.

2153238281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153238281 is an equidigital number, since it uses as much as digits as its factorization.

2153238281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 2153238281 is about 46402.9986207788. The cubic root of 2153238281 is about 1291.3105446225.

The spelling of 2153238281 in words is "two billion, one hundred fifty-three million, two hundred thirty-eight thousand, two hundred eighty-one".