258228532421 has 2 divisors, whose sum is σ = 258228532422. Its totient is φ = 258228532420.

The previous prime is 258228532409. The next prime is 258228532423. The reversal of 258228532421 is 124235822852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149371428196 + 108857104225 = 386486^2 + 329935^2 .

It is a cyclic number.

It is not a de Polignac number, because 258228532421 - 2¹⁴ = 258228516037 is a prime.

Together with 258228532423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258228532423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129114266210 + 129114266211.

It is an arithmetic number, because the mean of its divisors is an integer number (129114266211).

Almost surely, 2^258228532421 is an apocalyptic number.

It is an amenable number.

258228532421 is a deficient number, since it is larger than the sum of its proper divisors (1).

258228532421 is an equidigital number, since it uses as much as digits as its factorization.

258228532421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 614400, while the sum is 44.

The spelling of 258228532421 in words is "two hundred fifty-eight billion, two hundred twenty-eight million, five hundred thirty-two thousand, four hundred twenty-one".