145021215 has 8 divisors (see below), whose sum is σ = 232033968. Its totient is φ = 77344640.

The previous prime is 145021211. The next prime is 145021231. The reversal of 145021215 is 512120541.

145021215 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 not a de Polignac number, because 145021215 - 2² = 145021211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 145021191 and 145021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145021211) 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, 4834026 + ... + 4834055.

It is an arithmetic number, because the mean of its divisors is an integer number (29004246).

Almost surely, 2^145021215 is an apocalyptic number.

145021215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145021215 is a deficient number, since it is larger than the sum of its proper divisors (87012753).

145021215 is an equidigital number, since it uses as much as digits as its factorization.

145021215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9668089.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 145021215 is about 12042.4754515008. The cubic root of 145021215 is about 525.3844078083.

Adding to 145021215 its reverse (512120541), we get a palindrome (657141756).

The spelling of 145021215 in words is "one hundred forty-five million, twenty-one thousand, two hundred fifteen".