2251771 has 2 divisors, whose sum is σ = 2251772. Its totient is φ = 2251770.

The previous prime is 2251741. The next prime is 2251807. The reversal of 2251771 is 1771522.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2251771 - 2⁷ = 2251643 is a prime.

2251771 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2251741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125885 + 1125886.

It is an arithmetic number, because the mean of its divisors is an integer number (1125886).

2^2251771 is an apocalyptic number.

2251771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251771 is an equidigital number, since it uses as much as digits as its factorization.

2251771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 980, while the sum is 25.

The square root of 2251771 is about 1500.5902172145. The cubic root of 2251771 is about 131.0714409385.

Subtracting from 2251771 its reverse (1771522), we obtain a square (480249 = 693²).

The spelling of 2251771 in words is "two million, two hundred fifty-one thousand, seven hundred seventy-one".