58731221 has 2 divisors, whose sum is σ = 58731222. Its totient is φ = 58731220.

The previous prime is 58731193. The next prime is 58731241. The reversal of 58731221 is 12213785.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57168721 + 1562500 = 7561^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 58731221 - 2¹⁸ = 58469077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58731241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29365610 + 29365611.

It is an arithmetic number, because the mean of its divisors is an integer number (29365611).

Almost surely, 2^58731221 is an apocalyptic number.

It is an amenable number.

58731221 is a deficient number, since it is larger than the sum of its proper divisors (1).

58731221 is an equidigital number, since it uses as much as digits as its factorization.

58731221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 58731221 is about 7663.6297535828. The cubic root of 58731221 is about 388.7075802116.

The spelling of 58731221 in words is "fifty-eight million, seven hundred thirty-one thousand, two hundred twenty-one".