58138561 has 4 divisors (see below), whose sum is σ = 62610772. Its totient is φ = 53666352.

The previous prime is 58138543. The next prime is 58138567. The reversal of 58138561 is 16583185.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16583185 = 5 ⋅3316637.

It can be written as a sum of positive squares in 2 ways, for example, as 36978561 + 21160000 = 6081^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 58138561 - 2¹⁵ = 58105793 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 58138561.

It is not an unprimeable number, because it can be changed into a prime (58138567) 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, 2236086 + ... + 2236111.

It is an arithmetic number, because the mean of its divisors is an integer number (15652693).

Almost surely, 2^58138561 is an apocalyptic number.

It is an amenable number.

58138561 is a deficient number, since it is larger than the sum of its proper divisors (4472211).

58138561 is a wasteful number, since it uses less digits than its factorization.

58138561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472210.

The product of its digits is 28800, while the sum is 37.

The square root of 58138561 is about 7624.8646545365. The cubic root of 58138561 is about 387.3956675064.

The spelling of 58138561 in words is "fifty-eight million, one hundred thirty-eight thousand, five hundred sixty-one".