145233431 has 32 divisors (see below), whose sum is σ = 187453440. Its totient is φ = 109587456.

The previous prime is 145233391. The next prime is 145233437. The reversal of 145233431 is 134332541.

It is not a de Polignac number, because 145233431 - 2¹⁰ = 145232407 is a prime.

It is a super-2 number, since 2×145233431² = 42185498960063522, 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 145233431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145233437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128075 + ... + 129203.

It is an arithmetic number, because the mean of its divisors is an integer number (5857920).

Almost surely, 2^145233431 is an apocalyptic number.

145233431 is a deficient number, since it is larger than the sum of its proper divisors (42220009).

145233431 is a wasteful number, since it uses less digits than its factorization.

145233431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223.

The product of its digits is 4320, while the sum is 26.

The square root of 145233431 is about 12051.2833756410. The cubic root of 145233431 is about 525.6405557024.

Adding to 145233431 its reverse (134332541), we get a palindrome (279565972).

The spelling of 145233431 in words is "one hundred forty-five million, two hundred thirty-three thousand, four hundred thirty-one".