58218821 has 2 divisors, whose sum is σ = 58218822. Its totient is φ = 58218820.

The previous prime is 58218799. The next prime is 58218841. The reversal of 58218821 is 12881285.

58218821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46922500 + 11296321 = 6850^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 58218821 - 2²² = 54024517 is a prime.

It is a super-2 number, since 2×58218821² = 6778862237260082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58218841) 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 as a sum of consecutive naturals, namely, 29109410 + 29109411.

It is an arithmetic number, because the mean of its divisors is an integer number (29109411).

Almost surely, 2^58218821 is an apocalyptic number.

It is an amenable number.

58218821 is a deficient number, since it is larger than the sum of its proper divisors (1).

58218821 is an equidigital number, since it uses as much as digits as its factorization.

58218821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10240, while the sum is 35.

The square root of 58218821 is about 7630.1258836273. The cubic root of 58218821 is about 387.5738514809.

The spelling of 58218821 in words is "fifty-eight million, two hundred eighteen thousand, eight hundred twenty-one".