2258784021 has 8 divisors (see below), whose sum is σ = 3243382240. Its totient is φ = 1390020912.

The previous prime is 2258783993. The next prime is 2258784053. The reversal of 2258784021 is 1204878522.

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

It is not a de Polignac number, because 2258784021 - 2⁷ = 2258783893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 57917539 = 2258784021 / (2 + 2 + 5 + 8 + 7 + 8 + 4 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2258784221) 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, 28958731 + ... + 28958808.

It is an arithmetic number, because the mean of its divisors is an integer number (405422780).

Almost surely, 2^2258784021 is an apocalyptic number.

It is an amenable number.

2258784021 is a deficient number, since it is larger than the sum of its proper divisors (984598219).

2258784021 is a wasteful number, since it uses less digits than its factorization.

2258784021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57917555.

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 2258784021 is about 47526.6664200215. Note that the first 3 decimals coincide. The cubic root of 2258784021 is about 1312.0737159667.

The spelling of 2258784021 in words is "two billion, two hundred fifty-eight million, seven hundred eighty-four thousand, twenty-one".