258228522421 has 4 divisors (see below), whose sum is σ = 258250127200. Its totient is φ = 258206917644.

The previous prime is 258228522373. The next prime is 258228522437. The reversal of 258228522421 is 124225822852.

It is a happy number.

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 258228522421 - 2²¹ = 258226425269 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 (258228532421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10784451 + ... + 10808368.

It is an arithmetic number, because the mean of its divisors is an integer number (64562531800).

Almost surely, 2^258228522421 is an apocalyptic number.

It is an amenable number.

258228522421 is a deficient number, since it is larger than the sum of its proper divisors (21604779).

258228522421 is a wasteful number, since it uses less digits than its factorization.

258228522421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21604778.

The product of its digits is 409600, while the sum is 43.

The spelling of 258228522421 in words is "two hundred fifty-eight billion, two hundred twenty-eight million, five hundred twenty-two thousand, four hundred twenty-one".