145240213 has 4 divisors (see below), whose sum is σ = 145264320. Its totient is φ = 145216108.

The previous prime is 145240201. The next prime is 145240217. The reversal of 145240213 is 312042541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 145240213 - 2⁵ = 145240181 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 (145240217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5748 + ... + 17986.

It is an arithmetic number, because the mean of its divisors is an integer number (36316080).

Almost surely, 2^145240213 is an apocalyptic number.

It is an amenable number.

145240213 is a deficient number, since it is larger than the sum of its proper divisors (24107).

145240213 is a wasteful number, since it uses less digits than its factorization.

145240213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24106.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 145240213 is about 12051.5647531762. The cubic root of 145240213 is about 525.6487375623.

Adding to 145240213 its reverse (312042541), we get a palindrome (457282754).

The spelling of 145240213 in words is "one hundred forty-five million, two hundred forty thousand, two hundred thirteen".