136620231 has 16 divisors (see below), whose sum is σ = 199436160. Its totient is φ = 82501920.

The previous prime is 136620229. The next prime is 136620257. The reversal of 136620231 is 132026631.

It is a happy number.

It is not a de Polignac number, because 136620231 - 2¹ = 136620229 is a prime.

It is a super-2 number, since 2×136620231² = 37330175036986722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136620221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2025 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (12464760).

Almost surely, 2^136620231 is an apocalyptic number.

136620231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136620231 is a deficient number, since it is larger than the sum of its proper divisors (62815929).

136620231 is a wasteful number, since it uses less digits than its factorization.

136620231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14926.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 136620231 is about 11688.4657248075. The cubic root of 136620231 is about 515.0368918179.

Adding to 136620231 its reverse (132026631), we get a palindrome (268646862).

The spelling of 136620231 in words is "one hundred thirty-six million, six hundred twenty thousand, two hundred thirty-one".