2102651 has 2 divisors, whose sum is σ = 2102652. Its totient is φ = 2102650.

The previous prime is 2102647. The next prime is 2102687. The reversal of 2102651 is 1562012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102651 - 2² = 2102647 is a prime.

It is a super-2 number, since 2×2102651² = 8842282455602, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2102251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051325 + 1051326.

It is an arithmetic number, because the mean of its divisors is an integer number (1051326).

2^2102651 is an apocalyptic number.

2102651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102651 is an equidigital number, since it uses as much as digits as its factorization.

2102651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2102651 is about 1450.0520680307. The cubic root of 2102651 is about 128.1117797980. Note that the first 3 decimals are identical.

Adding to 2102651 its reverse (1562012), we get a palindrome (3664663).

The spelling of 2102651 in words is "two million, one hundred two thousand, six hundred fifty-one".