28058221213 has 4 divisors (see below), whose sum is σ = 30608968608. Its totient is φ = 25507473820.

The previous prime is 28058221133. The next prime is 28058221231. The reversal of 28058221213 is 31212285082.

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.

It is a cyclic number.

It is not a de Polignac number, because 28058221213 - 2¹⁷ = 28058090141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28058221283) 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, 1275373681 + ... + 1275373702.

It is an arithmetic number, because the mean of its divisors is an integer number (7652242152).

Almost surely, 2^28058221213 is an apocalyptic number.

It is an amenable number.

28058221213 is a deficient number, since it is larger than the sum of its proper divisors (2550747395).

28058221213 is a wasteful number, since it uses less digits than its factorization.

28058221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550747394.

The product of its (nonzero) digits is 15360, while the sum is 34.

The spelling of 28058221213 in words is "twenty-eight billion, fifty-eight million, two hundred twenty-one thousand, two hundred thirteen".