2281507 has 4 divisors (see below), whose sum is σ = 2355136. Its totient is φ = 2207880.

The previous prime is 2281493. The next prime is 2281529. The reversal of 2281507 is 7051822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7051822 = 2 ⋅3525911.

It is a cyclic number.

It is not a de Polignac number, because 2281507 - 2⁷ = 2281379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2281567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36768 + ... + 36829.

It is an arithmetic number, because the mean of its divisors is an integer number (588784).

2^2281507 is an apocalyptic number.

2281507 is a deficient number, since it is larger than the sum of its proper divisors (73629).

2281507 is an equidigital number, since it uses as much as digits as its factorization.

2281507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73628.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2281507 is about 1510.4658221886. The cubic root of 2281507 is about 131.6458789664.

The spelling of 2281507 in words is "two million, two hundred eighty-one thousand, five hundred seven".