135146431 has 4 divisors (see below), whose sum is σ = 154453072. Its totient is φ = 115839792.

The previous prime is 135146423. The next prime is 135146477. The reversal of 135146431 is 134641531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134641531 = 503 ⋅267677.

It is a cyclic number.

It is not a de Polignac number, because 135146431 - 2³ = 135146423 is a prime.

It is a super-2 number, since 2×135146431² = 36529115624075522, 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 135146431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135146731) 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, 9653310 + ... + 9653323.

It is an arithmetic number, because the mean of its divisors is an integer number (38613268).

Almost surely, 2^135146431 is an apocalyptic number.

135146431 is a deficient number, since it is larger than the sum of its proper divisors (19306641).

135146431 is an equidigital number, since it uses as much as digits as its factorization.

135146431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19306640.

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

The square root of 135146431 is about 11625.2497177480. The cubic root of 135146431 is about 513.1781936405.

Adding to 135146431 its reverse (134641531), we get a palindrome (269787962).

The spelling of 135146431 in words is "one hundred thirty-five million, one hundred forty-six thousand, four hundred thirty-one".