145522215 has 48 divisors (see below), whose sum is σ = 264126720. Its totient is φ = 74027520.

The previous prime is 145522183. The next prime is 145522217. The reversal of 145522215 is 512225541.

It is not a de Polignac number, because 145522215 - 2⁵ = 145522183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145522217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 101121 + ... + 102549.

It is an arithmetic number, because the mean of its divisors is an integer number (5502640).

Almost surely, 2^145522215 is an apocalyptic number.

145522215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145522215 is a deficient number, since it is larger than the sum of its proper divisors (118604505).

145522215 is a wasteful number, since it uses less digits than its factorization.

145522215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544 (or 1541 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 145522215 is about 12063.2588880451. The cubic root of 145522215 is about 525.9887218254.

Adding to 145522215 its reverse (512225541), we get a palindrome (657747756).

The spelling of 145522215 in words is "one hundred forty-five million, five hundred twenty-two thousand, two hundred fifteen".