2251913665 has 8 divisors (see below), whose sum is σ = 2703169728. Its totient is φ = 1800948720.

The previous prime is 2251913663. The next prime is 2251913683. The reversal of 2251913665 is 5663191522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2251913665 - 2¹ = 2251913663 is a prime.

It is a super-2 number, since 2×2251913665² = 10142230309227464450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251913663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55381 + ... + 87010.

It is an arithmetic number, because the mean of its divisors is an integer number (337896216).

Almost surely, 2^2251913665 is an apocalyptic number.

It is an amenable number.

2251913665 is a deficient number, since it is larger than the sum of its proper divisors (451256063).

2251913665 is a wasteful number, since it uses less digits than its factorization.

2251913665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145559.

The product of its digits is 97200, while the sum is 40.

The square root of 2251913665 is about 47454.3324154918. The cubic root of 2251913665 is about 1310.7420896901.

The spelling of 2251913665 in words is "two billion, two hundred fifty-one million, nine hundred thirteen thousand, six hundred sixty-five".