58228721 has 2 divisors, whose sum is σ = 58228722. Its totient is φ = 58228720.

The previous prime is 58228691. The next prime is 58228739. The reversal of 58228721 is 12782285.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55338721 + 2890000 = 7439^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 58228721 - 2²² = 54034417 is a prime.

It is not a weakly prime, because it can be changed into another prime (58225721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29114360 + 29114361.

It is an arithmetic number, because the mean of its divisors is an integer number (29114361).

Almost surely, 2^58228721 is an apocalyptic number.

It is an amenable number.

58228721 is a deficient number, since it is larger than the sum of its proper divisors (1).

58228721 is an equidigital number, since it uses as much as digits as its factorization.

58228721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17920, while the sum is 35.

The square root of 58228721 is about 7630.7746002618. The cubic root of 58228721 is about 387.5958189683.

The spelling of 58228721 in words is "fifty-eight million, two hundred twenty-eight thousand, seven hundred twenty-one".