2267991 has 24 divisors (see below), whose sum is σ = 3694080. Its totient is φ = 1328400.

The previous prime is 2267983. The next prime is 2268001. The reversal of 2267991 is 1997622.

It is not a de Polignac number, because 2267991 - 2³ = 2267983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2267911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2700 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (153920).

2^2267991 is an apocalyptic number.

2267991 is a deficient number, since it is larger than the sum of its proper divisors (1426089).

2267991 is a wasteful number, since it uses less digits than its factorization.

2267991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787 (or 784 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 2267991 is about 1505.9850596868. The cubic root of 2267991 is about 131.3854004060.

The spelling of 2267991 in words is "two million, two hundred sixty-seven thousand, nine hundred ninety-one".