58421521 has 4 divisors (see below), whose sum is σ = 59293552. Its totient is φ = 57549492.

The previous prime is 58421513. The next prime is 58421543. The reversal of 58421521 is 12512485.

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 58421521 - 2³ = 58421513 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 58421521.

It is not an unprimeable number, because it can be changed into a prime (58421621) 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, 435915 + ... + 436048.

It is an arithmetic number, because the mean of its divisors is an integer number (14823388).

Almost surely, 2^58421521 is an apocalyptic number.

It is an amenable number.

58421521 is a deficient number, since it is larger than the sum of its proper divisors (872031).

58421521 is an equidigital number, since it uses as much as digits as its factorization.

58421521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872030.

The product of its digits is 3200, while the sum is 28.

The square root of 58421521 is about 7643.3972158982. The cubic root of 58421521 is about 388.0231347137.

The spelling of 58421521 in words is "fifty-eight million, four hundred twenty-one thousand, five hundred twenty-one".