135422231 has 8 divisors (see below), whose sum is σ = 157927200. Its totient is φ = 116075904.

The previous prime is 135422213. The next prime is 135422249. The reversal of 135422231 is 132224531.

It is an interprime number because it is at equal distance from previous prime (135422213) and next prime (135422249).

It is a de Polignac number, because none of the positive numbers 2^k-135422231 is a prime.

It is a super-2 number, since 2×135422231² = 36678361298034722, 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 = 135422197 and 135422206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135422531) 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, 197066 + ... + 197751.

It is an arithmetic number, because the mean of its divisors is an integer number (19740900).

Almost surely, 2^135422231 is an apocalyptic number.

135422231 is a deficient number, since it is larger than the sum of its proper divisors (22504969).

135422231 is an frugal number, since it uses more digits than its factorization.

135422231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394838 (or 394824 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 135422231 is about 11637.1057827967. The cubic root of 135422231 is about 513.5270458075.

Adding to 135422231 its reverse (132224531), we get a palindrome (267646762).

The spelling of 135422231 in words is "one hundred thirty-five million, four hundred twenty-two thousand, two hundred thirty-one".