145330431 has 4 divisors (see below), whose sum is σ = 193773912. Its totient is φ = 96886952.

The previous prime is 145330417. The next prime is 145330441. The reversal of 145330431 is 134033541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134033541 = 3 ⋅44677847.

It is a cyclic number.

It is not a de Polignac number, because 145330431 - 2¹¹ = 145328383 is a prime.

It is a super-2 number, since 2×145330431² = 42241868349291522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145330441) 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, 24221736 + ... + 24221741.

It is an arithmetic number, because the mean of its divisors is an integer number (48443478).

Almost surely, 2^145330431 is an apocalyptic number.

145330431 is a deficient number, since it is larger than the sum of its proper divisors (48443481).

145330431 is an equidigital number, since it uses as much as digits as its factorization.

145330431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48443480.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 145330431 is about 12055.3071715324. The cubic root of 145330431 is about 525.7575530688.

Adding to 145330431 its reverse (134033541), we get a palindrome (279363972).

The spelling of 145330431 in words is "one hundred forty-five million, three hundred thirty thousand, four hundred thirty-one".