2251791 has 6 divisors (see below), whose sum is σ = 3252600. Its totient is φ = 1501188.

The previous prime is 2251771. The next prime is 2251807. The reversal of 2251791 is 1971522.

It is not a de Polignac number, because 2251791 - 2⁶ = 2251727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251741) 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, 125091 + ... + 125108.

It is an arithmetic number, because the mean of its divisors is an integer number (542100).

2^2251791 is an apocalyptic number.

2251791 is a deficient number, since it is larger than the sum of its proper divisors (1000809).

2251791 is a wasteful number, since it uses less digits than its factorization.

2251791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250205 (or 250202 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 2251791 is about 1500.5968812443. The cubic root of 2251791 is about 131.0718289918.

It can be divided in two parts, 225 and 1791, that added together give a triangular number (2016 = T₆₃).

The spelling of 2251791 in words is "two million, two hundred fifty-one thousand, seven hundred ninety-one".