145033431 has 4 divisors (see below), whose sum is σ = 193377912. Its totient is φ = 96688952.

The previous prime is 145033411. The next prime is 145033439. The reversal of 145033431 is 134330541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145033431 - 2⁹ = 145032919 is a prime.

It is a super-2 number, since 2×145033431² = 42069392215263522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145033439) 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, 24172236 + ... + 24172241.

It is an arithmetic number, because the mean of its divisors is an integer number (48344478).

Almost surely, 2^145033431 is an apocalyptic number.

145033431 is a deficient number, since it is larger than the sum of its proper divisors (48344481).

145033431 is an equidigital number, since it uses as much as digits as its factorization.

145033431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48344480.

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

The square root of 145033431 is about 12042.9826455077. The cubic root of 145033431 is about 525.3991594792.

Adding to 145033431 its reverse (134330541), we get a palindrome (279363972).

The spelling of 145033431 in words is "one hundred forty-five million, thirty-three thousand, four hundred thirty-one".