136550521 has 4 divisors (see below), whose sum is σ = 138195792. Its totient is φ = 134905252.

The previous prime is 136550509. The next prime is 136550539. The reversal of 136550521 is 125055631.

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: 125055631 = 113 ⋅1106687.

It is a cyclic number.

It is not a de Polignac number, because 136550521 - 2¹¹ = 136548473 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 136550521.

It is not an unprimeable number, because it can be changed into a prime (136550501) 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, 822511 + ... + 822676.

It is an arithmetic number, because the mean of its divisors is an integer number (34548948).

Almost surely, 2^136550521 is an apocalyptic number.

It is an amenable number.

136550521 is a deficient number, since it is larger than the sum of its proper divisors (1645271).

136550521 is an equidigital number, since it uses as much as digits as its factorization.

136550521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645270.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 136550521 is about 11685.4833447316. The cubic root of 136550521 is about 514.9492783176.

The spelling of 136550521 in words is "one hundred thirty-six million, five hundred fifty thousand, five hundred twenty-one".