136243031 has 4 divisors (see below), whose sum is σ = 136375200.
Its totient is φ = 136110864.
The previous prime is 136243021. The next prime is 136243043. The reversal of 136243031 is 130342631.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130342631 = 31 ⋅4204601.
It is a cyclic number.
It is not a de Polignac number, because 136243031 - 214 = 136226647 is a prime.
It is a super-2 number, since 2×1362430312 = 37124326992133922, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 136242988 and 136243006.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (136243021) 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, 64526 + ... + 66603.
It is an arithmetic number, because the mean of its divisors is an integer number (34093800).
Almost surely, 2136243031 is an apocalyptic number.
136243031 is a deficient number, since it is larger than the sum of its proper divisors (132169).
136243031 is a wasteful number, since it uses less digits than its factorization.
136243031 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 132168.
The product of its (nonzero) digits is 1296, while the sum is 23.
The square root of 136243031 is about 11672.3190069497.
The cubic root of 136243031 is about 514.5624599327.
Adding to 136243031 its reverse (130342631), we get a palindrome (266585662).
The spelling of 136243031 in words is "one hundred thirty-six million, two hundred forty-three thousand, thirty-one".