58220821 has 4 divisors (see below), whose sum is σ = 60098944. Its totient is φ = 56342700.

The previous prime is 58220819. The next prime is 58220837. The reversal of 58220821 is 12802285.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12802285 = 5 ⋅2560457.

It is a cyclic number.

It is not a de Polignac number, because 58220821 - 2¹ = 58220819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 58220821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (58220891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939015 + ... + 939076.

It is an arithmetic number, because the mean of its divisors is an integer number (15024736).

Almost surely, 2^58220821 is an apocalyptic number.

It is an amenable number.

58220821 is a deficient number, since it is larger than the sum of its proper divisors (1878123).

58220821 is a wasteful number, since it uses less digits than its factorization.

58220821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878122.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 58220821 is about 7630.2569419385. The cubic root of 58220821 is about 387.5782895578.

The spelling of 58220821 in words is "fifty-eight million, two hundred twenty thousand, eight hundred twenty-one".