145135431 has 36 divisors (see below), whose sum is σ = 243542416. Its totient is φ = 81587520.

The previous prime is 145135429. The next prime is 145135447. The reversal of 145135431 is 134531541.

It is a happy number.

145135431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145135431 - 2¹ = 145135429 is a prime.

It is a super-2 number, since 2×145135431² = 42128586663111522, 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 = 145135395 and 145135404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145135411) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 317355 + ... + 317811.

Almost surely, 2^145135431 is an apocalyptic number.

145135431 is a deficient number, since it is larger than the sum of its proper divisors (98406985).

145135431 is an equidigital number, since it uses as much as digits as its factorization.

145135431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612 (or 538 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 145135431 is about 12047.2167325071. The cubic root of 145135431 is about 525.5222992629.

Adding to 145135431 its reverse (134531541), we get a palindrome (279666972).

The spelling of 145135431 in words is "one hundred forty-five million, one hundred thirty-five thousand, four hundred thirty-one".