135223831 has 16 divisors (see below), whose sum is σ = 151538688. Its totient is φ = 119996800.

The previous prime is 135223819. The next prime is 135223861. The reversal of 135223831 is 138322531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135223831 is a prime.

It is a super-2 number, since 2×135223831² = 36570968940633122, 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 135223831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135223801) 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 15 ways as a sum of consecutive naturals, for example, 25326 + ... + 30196.

It is an arithmetic number, because the mean of its divisors is an integer number (9471168).

Almost surely, 2^135223831 is an apocalyptic number.

135223831 is a deficient number, since it is larger than the sum of its proper divisors (16314857).

135223831 is a wasteful number, since it uses less digits than its factorization.

135223831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982.

The product of its digits is 4320, while the sum is 28.

The square root of 135223831 is about 11628.5782019987. The cubic root of 135223831 is about 513.2761427356.

The spelling of 135223831 in words is "one hundred thirty-five million, two hundred twenty-three thousand, eight hundred thirty-one".