145332431 has 4 divisors (see below), whose sum is σ = 145383264. Its totient is φ = 145281600.

The previous prime is 145332409. The next prime is 145332443. The reversal of 145332431 is 134233541.

145332431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134233541 = 13 ⋅10325657.

It is a cyclic number.

It is not a de Polignac number, because 145332431 - 2¹⁸ = 145070287 is a prime.

It is a super-2 number, since 2×145332431² = 42243031000739522, 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 145332431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145032431) 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, 20855 + ... + 26936.

It is an arithmetic number, because the mean of its divisors is an integer number (36345816).

Almost surely, 2^145332431 is an apocalyptic number.

145332431 is a deficient number, since it is larger than the sum of its proper divisors (50833).

145332431 is an equidigital number, since it uses as much as digits as its factorization.

145332431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50832.

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

The square root of 145332431 is about 12055.3901222648. The cubic root of 145332431 is about 525.7599648378.

Adding to 145332431 its reverse (134233541), we get a palindrome (279565972).

The spelling of 145332431 in words is "one hundred forty-five million, three hundred thirty-two thousand, four hundred thirty-one".