145253533 has 4 divisors (see below), whose sum is σ = 151568928. Its totient is φ = 138938140.

The previous prime is 145253531. The next prime is 145253551. The reversal of 145253533 is 335352541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 335352541 = 457 ⋅733813.

It is a cyclic number.

It is not a de Polignac number, because 145253533 - 2¹ = 145253531 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145253495 and 145253504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145253531) 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, 3157663 + ... + 3157708.

It is an arithmetic number, because the mean of its divisors is an integer number (37892232).

Almost surely, 2^145253533 is an apocalyptic number.

It is an amenable number.

145253533 is a deficient number, since it is larger than the sum of its proper divisors (6315395).

145253533 is an equidigital number, since it uses as much as digits as its factorization.

145253533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6315394.

The product of its digits is 27000, while the sum is 31.

The square root of 145253533 is about 12052.1173658407. The cubic root of 145253533 is about 525.6648061772.

The spelling of 145253533 in words is "one hundred forty-five million, two hundred fifty-three thousand, five hundred thirty-three".