2245696921 has 4 divisors (see below), whose sum is σ = 2418442852. Its totient is φ = 2072950992.

The previous prime is 2245696909. The next prime is 2245696933. The reversal of 2245696921 is 1296965422.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2245696909) and next prime (2245696933).

It can be written as a sum of positive squares in 2 ways, for example, as 152176896 + 2093520025 = 12336^2 + 45755^2 .

It is a cyclic number.

It is not a de Polignac number, because 2245696921 - 2¹⁵ = 2245664153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2245696021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86372946 + ... + 86372971.

It is an arithmetic number, because the mean of its divisors is an integer number (604610713).

Almost surely, 2^2245696921 is an apocalyptic number.

It is an amenable number.

2245696921 is a deficient number, since it is larger than the sum of its proper divisors (172745931).

2245696921 is a wasteful number, since it uses less digits than its factorization.

2245696921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172745930.

The product of its digits is 466560, while the sum is 46.

The square root of 2245696921 is about 47388.7847596876. The cubic root of 2245696921 is about 1309.5348116170.

The spelling of 2245696921 in words is "two billion, two hundred forty-five million, six hundred ninety-six thousand, nine hundred twenty-one".