145502213 has 8 divisors (see below), whose sum is σ = 147746328. Its totient is φ = 143265024.

The previous prime is 145502207. The next prime is 145502219. The reversal of 145502213 is 312205541.

It is an interprime number because it is at equal distance from previous prime (145502207) and next prime (145502219).

It can be written as a sum of positive squares in 4 ways, for example, as 12837889 + 132664324 = 3583^2 + 11518^2 .

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 145502213 - 2⁴ = 145502197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145502219) 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, 53945 + ... + 56577.

It is an arithmetic number, because the mean of its divisors is an integer number (18468291).

Almost surely, 2^145502213 is an apocalyptic number.

It is an amenable number.

145502213 is a deficient number, since it is larger than the sum of its proper divisors (2244115).

145502213 is an equidigital number, since it uses as much as digits as its factorization.

145502213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 145502213 is about 12062.4298132673. The cubic root of 145502213 is about 525.9646217055.

Adding to 145502213 its reverse (312205541), we get a palindrome (457707754).

The spelling of 145502213 in words is "one hundred forty-five million, five hundred two thousand, two hundred thirteen".