145533215 has 8 divisors (see below), whose sum is σ = 175128480. Its totient is φ = 116100832.

The previous prime is 145533211. The next prime is 145533221. The reversal of 145533215 is 512335541.

145533215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145533215 - 2² = 145533211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145533211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38744 + ... + 42333.

It is an arithmetic number, because the mean of its divisors is an integer number (21891060).

Almost surely, 2^145533215 is an apocalyptic number.

145533215 is a deficient number, since it is larger than the sum of its proper divisors (29595265).

145533215 is an equidigital number, since it uses as much as digits as its factorization.

145533215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81441.

The product of its digits is 9000, while the sum is 29.

The square root of 145533215 is about 12063.7148092949. The cubic root of 145533215 is about 526.0019746248.

Adding to 145533215 its reverse (512335541), we get a palindrome (657868756).

The spelling of 145533215 in words is "one hundred forty-five million, five hundred thirty-three thousand, two hundred fifteen".