145320431 has 2 divisors, whose sum is σ = 145320432. Its totient is φ = 145320430.

The previous prime is 145320419. The next prime is 145320433. The reversal of 145320431 is 134023541.

It is a strong prime.

It is an emirp because it is prime and its reverse (134023541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145320431 - 2⁶ = 145320367 is a prime.

It is a super-2 number, since 2×145320431² = 42236055332051522, which contains 22 as substring.

Together with 145320433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 145320397 and 145320406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145320433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72660215 + 72660216.

It is an arithmetic number, because the mean of its divisors is an integer number (72660216).

Almost surely, 2^145320431 is an apocalyptic number.

145320431 is a deficient number, since it is larger than the sum of its proper divisors (1).

145320431 is an equidigital number, since it uses as much as digits as its factorization.

145320431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 145320431 is about 12054.8924093083. The cubic root of 145320431 is about 525.7454938919.

Adding to 145320431 its reverse (134023541), we get a palindrome (279343972).

The spelling of 145320431 in words is "one hundred forty-five million, three hundred twenty thousand, four hundred thirty-one".