135431441 has 4 divisors (see below), whose sum is σ = 135800832. Its totient is φ = 135062052.

The previous prime is 135431431. The next prime is 135431473. The reversal of 135431441 is 144134531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135431441 - 2¹⁸ = 135169297 is a prime.

It is a super-2 number, since 2×135431441² = 36683350422672962, 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 135431441.

It is not an unprimeable number, because it can be changed into a prime (135431431) 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, 184145 + ... + 184878.

It is an arithmetic number, because the mean of its divisors is an integer number (33950208).

Almost surely, 2^135431441 is an apocalyptic number.

It is an amenable number.

135431441 is a deficient number, since it is larger than the sum of its proper divisors (369391).

135431441 is an equidigital number, since it uses as much as digits as its factorization.

135431441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369390.

The product of its digits is 2880, while the sum is 26.

The square root of 135431441 is about 11637.5014930182. The cubic root of 135431441 is about 513.5386871184.

Adding to 135431441 its reverse (144134531), we get a palindrome (279565972).

The spelling of 135431441 in words is "one hundred thirty-five million, four hundred thirty-one thousand, four hundred forty-one".