58781221 has 2 divisors, whose sum is σ = 58781222. Its totient is φ = 58781220.

The previous prime is 58781159. The next prime is 58781243. The reversal of 58781221 is 12218785.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37344321 + 21436900 = 6111^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 58781221 - 2¹⁷ = 58650149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (58781621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29390610 + 29390611.

It is an arithmetic number, because the mean of its divisors is an integer number (29390611).

Almost surely, 2^58781221 is an apocalyptic number.

It is an amenable number.

58781221 is a deficient number, since it is larger than the sum of its proper divisors (1).

58781221 is an equidigital number, since it uses as much as digits as its factorization.

58781221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 34.

The square root of 58781221 is about 7666.8912213491. The cubic root of 58781221 is about 388.8178558364.

The spelling of 58781221 in words is "fifty-eight million, seven hundred eighty-one thousand, two hundred twenty-one".