2254656021 has 4 divisors (see below), whose sum is σ = 3006208032. Its totient is φ = 1503104012.

The previous prime is 2254656007. The next prime is 2254656037. The reversal of 2254656021 is 1206564522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2254656021 - 2¹⁸ = 2254393877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2254656221) 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 3 ways as a sum of consecutive naturals, for example, 375776001 + ... + 375776006.

It is an arithmetic number, because the mean of its divisors is an integer number (751552008).

Almost surely, 2^2254656021 is an apocalyptic number.

It is an amenable number.

2254656021 is a deficient number, since it is larger than the sum of its proper divisors (751552011).

2254656021 is an equidigital number, since it uses as much as digits as its factorization.

2254656021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751552010.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 2254656021 is about 47483.2183092090. The cubic root of 2254656021 is about 1311.2739430131.

The spelling of 2254656021 in words is "two billion, two hundred fifty-four million, six hundred fifty-six thousand, twenty-one".