136315553221 has 4 divisors (see below), whose sum is σ = 136390003744. Its totient is φ = 136241102700.

The previous prime is 136315553189. The next prime is 136315553237. The reversal of 136315553221 is 122355513631.

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 136315553221 - 2⁵ = 136315553189 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 (136315553281) 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, 37222515 + ... + 37226176.

It is an arithmetic number, because the mean of its divisors is an integer number (34097500936).

Almost surely, 2^136315553221 is an apocalyptic number.

It is an amenable number.

136315553221 is a deficient number, since it is larger than the sum of its proper divisors (74450523).

136315553221 is an equidigital number, since it uses as much as digits as its factorization.

136315553221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74450522.

The product of its digits is 81000, while the sum is 37.

The spelling of 136315553221 in words is "one hundred thirty-six billion, three hundred fifteen million, five hundred fifty-three thousand, two hundred twenty-one".