145212213 has 8 divisors (see below), whose sum is σ = 194175648. Its totient is φ = 96528464.

The previous prime is 145212211. The next prime is 145212227. The reversal of 145212213 is 312212541.

145212213 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 145212213 - 2¹ = 145212211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145212213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145212211) 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, 68706 + ... + 70787.

It is an arithmetic number, because the mean of its divisors is an integer number (24271956).

Almost surely, 2^145212213 is an apocalyptic number.

It is an amenable number.

145212213 is a deficient number, since it is larger than the sum of its proper divisors (48963435).

145212213 is a wasteful number, since it uses less digits than its factorization.

145212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139843.

The product of its digits is 480, while the sum is 21.

The square root of 145212213 is about 12050.4030223059. The cubic root of 145212213 is about 525.6149564896.

Adding to 145212213 its reverse (312212541), we get a palindrome (457424754).

The spelling of 145212213 in words is "one hundred forty-five million, two hundred twelve thousand, two hundred thirteen".