136227681 has 12 divisors (see below), whose sum is σ = 208348452. Its totient is φ = 85476096.

The previous prime is 136227661. The next prime is 136227691. The reversal of 136227681 is 186722631.

It can be written as a sum of positive squares in 2 ways, for example, as 58064400 + 78163281 = 7620^2 + 8841^2 .

It is not a de Polignac number, because 136227681 - 2⁶ = 136227617 is a prime.

It is a super-2 number, since 2×136227681² = 37115962141275522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136227661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445036 + ... + 445341.

It is an arithmetic number, because the mean of its divisors is an integer number (17362371).

Almost surely, 2^136227681 is an apocalyptic number.

It is an amenable number.

136227681 is a deficient number, since it is larger than the sum of its proper divisors (72120771).

136227681 is a wasteful number, since it uses less digits than its factorization.

136227681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890400 (or 890397 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 136227681 is about 11671.6614498537. The cubic root of 136227681 is about 514.5431345885.

The spelling of 136227681 in words is "one hundred thirty-six million, two hundred twenty-seven thousand, six hundred eighty-one".