136722331 has 8 divisors (see below), whose sum is σ = 141747984. Its totient is φ = 131777280.

The previous prime is 136722329. The next prime is 136722337. The reversal of 136722331 is 133227631.

136722331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 136722331 - 2¹ = 136722329 is a prime.

It is a super-2 number, since 2×136722331² = 37385991588147122, which contains 22 as substring.

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 136722331.

It is not an unprimeable number, because it can be changed into a prime (136722337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16686 + ... + 23491.

It is an arithmetic number, because the mean of its divisors is an integer number (17718498).

Almost surely, 2^136722331 is an apocalyptic number.

136722331 is a deficient number, since it is larger than the sum of its proper divisors (5025653).

136722331 is an equidigital number, since it uses as much as digits as its factorization.

136722331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40301.

The product of its digits is 4536, while the sum is 28.

The square root of 136722331 is about 11692.8324626670. The cubic root of 136722331 is about 515.1651602113.

Adding to 136722331 its reverse (133227631), we get a palindrome (269949962).

The spelling of 136722331 in words is "one hundred thirty-six million, seven hundred twenty-two thousand, three hundred thirty-one".