145233553 has 4 divisors (see below), whose sum is σ = 147279168. Its totient is φ = 143187940.

The previous prime is 145233509. The next prime is 145233577. The reversal of 145233553 is 355332541.

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.

It is a cyclic number.

It is not a de Polignac number, because 145233553 - 2¹³ = 145225361 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 not an unprimeable number, because it can be changed into a prime (145233503) 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, 1022701 + ... + 1022842.

It is an arithmetic number, because the mean of its divisors is an integer number (36819792).

Almost surely, 2^145233553 is an apocalyptic number.

It is an amenable number.

145233553 is a deficient number, since it is larger than the sum of its proper divisors (2045615).

145233553 is an equidigital number, since it uses as much as digits as its factorization.

145233553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045614.

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

The square root of 145233553 is about 12051.2884373415. The cubic root of 145233553 is about 525.6407028864.

The spelling of 145233553 in words is "one hundred forty-five million, two hundred thirty-three thousand, five hundred fifty-three".