145616533 has 4 divisors (see below), whose sum is σ = 149003008. Its totient is φ = 142230060.

The previous prime is 145616521. The next prime is 145616557. The reversal of 145616533 is 335616541.

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: 335616541 = 13 ⋅25816657.

It is a cyclic number.

It is not a de Polignac number, because 145616533 - 2²⁵ = 112062101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145616563) 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, 1693173 + ... + 1693258.

It is an arithmetic number, because the mean of its divisors is an integer number (37250752).

Almost surely, 2^145616533 is an apocalyptic number.

It is an amenable number.

145616533 is a deficient number, since it is larger than the sum of its proper divisors (3386475).

145616533 is an equidigital number, since it uses as much as digits as its factorization.

145616533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386474.

The product of its digits is 32400, while the sum is 34.

The square root of 145616533 is about 12067.1675632685. The cubic root of 145616533 is about 526.1023344677.

The spelling of 145616533 in words is "one hundred forty-five million, six hundred sixteen thousand, five hundred thirty-three".