136156731 has 4 divisors (see below), whose sum is σ = 181542312. Its totient is φ = 90771152.

The previous prime is 136156721. The next prime is 136156789. The reversal of 136156731 is 137651631.

It is a happy number.

136156731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136156731 - 2⁶ = 136156667 is a prime.

It is a super-2 number, since 2×136156731² = 37077310793212722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136156692 and 136156701.

It is not an unprimeable number, because it can be changed into a prime (136156721) 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, 22692786 + ... + 22692791.

It is an arithmetic number, because the mean of its divisors is an integer number (45385578).

Almost surely, 2^136156731 is an apocalyptic number.

136156731 is a deficient number, since it is larger than the sum of its proper divisors (45385581).

136156731 is an equidigital number, since it uses as much as digits as its factorization.

136156731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45385580.

The product of its digits is 11340, while the sum is 33.

The square root of 136156731 is about 11668.6216409651. The cubic root of 136156731 is about 514.4537910846.

The spelling of 136156731 in words is "one hundred thirty-six million, one hundred fifty-six thousand, seven hundred thirty-one".