2152005021 has 6 divisors (see below), whose sum is σ = 3108451710. Its totient is φ = 1434670008.

The previous prime is 2152005019. The next prime is 2152005029. The reversal of 2152005021 is 1205002512.

It can be written as a sum of positive squares in only one way, i.e., 1935032121 + 216972900 = 43989^2 + 14730^2 .

It is not a de Polignac number, because 2152005021 - 2¹ = 2152005019 is a prime.

It is a super-2 number, since 2×2152005021² = 9262251220818420882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2152004985 and 2152005003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152005029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119555826 + ... + 119555843.

It is an arithmetic number, because the mean of its divisors is an integer number (518075285).

Almost surely, 2^2152005021 is an apocalyptic number.

It is an amenable number.

2152005021 is a deficient number, since it is larger than the sum of its proper divisors (956446689).

2152005021 is a wasteful number, since it uses less digits than its factorization.

2152005021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239111675 (or 239111672 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2152005021 is about 46389.7081366115. The cubic root of 2152005021 is about 1291.0639662804.

Adding to 2152005021 its reverse (1205002512), we get a palindrome (3357007533).

The spelling of 2152005021 in words is "two billion, one hundred fifty-two million, five thousand, twenty-one".