58001221 has 4 divisors (see below), whose sum is σ = 58017132. Its totient is φ = 57985312.

The previous prime is 58001197. The next prime is 58001267. The reversal of 58001221 is 12210085.

58001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12210085 = 5 ⋅2442017.

It can be written as a sum of positive squares in 2 ways, for example, as 6305121 + 51696100 = 2511^2 + 7190^2 .

It is a cyclic number.

It is not a de Polignac number, because 58001221 - 2¹⁹ = 57476933 is a prime.

It is a Duffinian number.

58001221 is a modest number, since divided by 1221 gives 58 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58001291) 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 in 3 ways as a sum of consecutive naturals, for example, 531 + ... + 10783.

It is an arithmetic number, because the mean of its divisors is an integer number (14504283).

Almost surely, 2^58001221 is an apocalyptic number.

It is an amenable number.

58001221 is a deficient number, since it is larger than the sum of its proper divisors (15911).

58001221 is a wasteful number, since it uses less digits than its factorization.

58001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15910.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 58001221 is about 7615.8532680193. The cubic root of 58001221 is about 387.0903803313.

It can be divided in two parts, 5800 and 1221, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 58001221 in words is "fifty-eight million, one thousand, two hundred twenty-one".