2265501997 has 24 divisors (see below), whose sum is σ = 2545837056. Its totient is φ = 2013924000.

The previous prime is 2265501961. The next prime is 2265502003. The reversal of 2265501997 is 7991055622.

It is not a de Polignac number, because 2265501997 - 2¹¹ = 2265499949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265501937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1408968 + ... + 1410574.

It is an arithmetic number, because the mean of its divisors is an integer number (106076544).

Almost surely, 2^2265501997 is an apocalyptic number.

It is an amenable number.

2265501997 is a deficient number, since it is larger than the sum of its proper divisors (280335059).

2265501997 is a wasteful number, since it uses less digits than its factorization.

2265501997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1870 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 2265501997 is about 47597.2898072989. The cubic root of 2265501997 is about 1313.3731991572.

The spelling of 2265501997 in words is "two billion, two hundred sixty-five million, five hundred one thousand, nine hundred ninety-seven".