135446431 has 4 divisors (see below), whose sum is σ = 138596392. Its totient is φ = 132296472.

The previous prime is 135446417. The next prime is 135446447. The reversal of 135446431 is 134644531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135446431 - 2¹⁹ = 134922143 is a prime.

It is a super-2 number, since 2×135446431² = 36691471341275522, 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 = 135446393 and 135446402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135444431) 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, 1574916 + ... + 1575001.

It is an arithmetic number, because the mean of its divisors is an integer number (34649098).

Almost surely, 2^135446431 is an apocalyptic number.

135446431 is a deficient number, since it is larger than the sum of its proper divisors (3149961).

135446431 is an equidigital number, since it uses as much as digits as its factorization.

135446431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149960.

The product of its digits is 17280, while the sum is 31.

The square root of 135446431 is about 11638.1455137835. The cubic root of 135446431 is about 513.5576331398.

The spelling of 135446431 in words is "one hundred thirty-five million, four hundred forty-six thousand, four hundred thirty-one".