2105251 has 2 divisors, whose sum is σ = 2105252. Its totient is φ = 2105250.

The previous prime is 2105231. The next prime is 2105267. The reversal of 2105251 is 1525012.

It is an a-pointer prime, because the next prime (2105267) can be obtained adding 2105251 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105251 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052625 + 1052626.

It is an arithmetic number, because the mean of its divisors is an integer number (1052626).

2^2105251 is an apocalyptic number.

2105251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105251 is an equidigital number, since it uses as much as digits as its factorization.

2105251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 2105251 is about 1450.9483105886. The cubic root of 2105251 is about 128.1645629162.

The spelling of 2105251 in words is "two million, one hundred five thousand, two hundred fifty-one".