2150631281 has 2 divisors, whose sum is σ = 2150631282. Its totient is φ = 2150631280.

The previous prime is 2150631277. The next prime is 2150631289. The reversal of 2150631281 is 1821360512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1742227600 + 408403681 = 41740^2 + 20209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150631281 - 2² = 2150631277 is a prime.

It is a super-2 number, since 2×2150631281² = 9250429813631401922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2150631289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075315640 + 1075315641.

It is an arithmetic number, because the mean of its divisors is an integer number (1075315641).

Almost surely, 2^2150631281 is an apocalyptic number.

It is an amenable number.

2150631281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150631281 is an equidigital number, since it uses as much as digits as its factorization.

2150631281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2150631281 is about 46374.8992559553. The cubic root of 2150631281 is about 1290.7891893908.

Adding to 2150631281 its reverse (1821360512), we get a palindrome (3971991793).

The spelling of 2150631281 in words is "two billion, one hundred fifty million, six hundred thirty-one thousand, two hundred eighty-one".