145505533 has 4 divisors (see below), whose sum is σ = 154064700. Its totient is φ = 136946368.

The previous prime is 145505531. The next prime is 145505543. The reversal of 145505533 is 335505541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114447204 + 31058329 = 10698^2 + 5573^2 .

It is a cyclic number.

It is not a de Polignac number, because 145505533 - 2¹ = 145505531 is a prime.

It is a super-2 number, since 2×145505533² = 42343720267228178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145505495 and 145505504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145505531) 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, 4279558 + ... + 4279591.

It is an arithmetic number, because the mean of its divisors is an integer number (38516175).

Almost surely, 2^145505533 is an apocalyptic number.

It is an amenable number.

145505533 is a deficient number, since it is larger than the sum of its proper divisors (8559167).

145505533 is an equidigital number, since it uses as much as digits as its factorization.

145505533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8559166.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 145505533 is about 12062.5674298633. The cubic root of 145505533 is about 525.9686220783.

The spelling of 145505533 in words is "one hundred forty-five million, five hundred five thousand, five hundred thirty-three".