2151251 has 2 divisors, whose sum is σ = 2151252. Its totient is φ = 2151250.

The previous prime is 2151241. The next prime is 2151263. The reversal of 2151251 is 1521512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2151251 - 2¹⁰ = 2150227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2151211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075625 + 1075626.

It is an arithmetic number, because the mean of its divisors is an integer number (1075626).

2^2151251 is an apocalyptic number.

2151251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151251 is an equidigital number, since it uses as much as digits as its factorization.

2151251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100, while the sum is 17.

The square root of 2151251 is about 1466.7143552853. The cubic root of 2151251 is about 129.0913160706.

Adding to 2151251 its reverse (1521512), we get a palindrome (3672763).

The spelling of 2151251 in words is "two million, one hundred fifty-one thousand, two hundred fifty-one".