2021447137 has 2 divisors, whose sum is σ = 2021447138. Its totient is φ = 2021447136.

The previous prime is 2021447119. The next prime is 2021447171. The reversal of 2021447137 is 7317441202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1642599841 + 378847296 = 40529^2 + 19464^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021447137 - 2⁷ = 2021447009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021447099 and 2021447108.

It is not a weakly prime, because it can be changed into another prime (2021444137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010723568 + 1010723569.

It is an arithmetic number, because the mean of its divisors is an integer number (1010723569).

Almost surely, 2^2021447137 is an apocalyptic number.

It is an amenable number.

2021447137 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021447137 is an equidigital number, since it uses as much as digits as its factorization.

2021447137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 2021447137 is about 44960.5064139629. The cubic root of 2021447137 is about 1264.4086634015.

Adding to 2021447137 its reverse (7317441202), we get a palindrome (9338888339).

The spelling of 2021447137 in words is "two billion, twenty-one million, four hundred forty-seven thousand, one hundred thirty-seven".