136518253 has 4 divisors (see below), whose sum is σ = 136584448. Its totient is φ = 136452060.

The previous prime is 136518229. The next prime is 136518259. The reversal of 136518253 is 352815631.

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 136518253 - 2¹³ = 136510061 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 (136518259) 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, 29901 + ... + 34162.

It is an arithmetic number, because the mean of its divisors is an integer number (34146112).

Almost surely, 2^136518253 is an apocalyptic number.

It is an amenable number.

136518253 is a deficient number, since it is larger than the sum of its proper divisors (66195).

136518253 is an equidigital number, since it uses as much as digits as its factorization.

136518253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66194.

The product of its digits is 21600, while the sum is 34.

The square root of 136518253 is about 11684.1025757223. The cubic root of 136518253 is about 514.9087128862.

It can be divided in two parts, 13651 and 8253, that added together give a square (21904 = 148²).

The spelling of 136518253 in words is "one hundred thirty-six million, five hundred eighteen thousand, two hundred fifty-three".