2006237521 has 2 divisors, whose sum is σ = 2006237522. Its totient is φ = 2006237520.

The previous prime is 2006237503. The next prime is 2006237533. The reversal of 2006237521 is 1257326002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1904449600 + 101787921 = 43640^2 + 10089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2006237521 - 2⁷ = 2006237393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2006237521.

It is not a weakly prime, because it can be changed into another prime (2006237501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1003118760 + 1003118761.

It is an arithmetic number, because the mean of its divisors is an integer number (1003118761).

Almost surely, 2^2006237521 is an apocalyptic number.

It is an amenable number.

2006237521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2006237521 is an equidigital number, since it uses as much as digits as its factorization.

2006237521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2006237521 is about 44791.0428657338. The cubic root of 2006237521 is about 1261.2294879357.

The spelling of 2006237521 in words is "two billion, six million, two hundred thirty-seven thousand, five hundred twenty-one".