155303213 has 4 divisors (see below), whose sum is σ = 167249628. Its totient is φ = 143356800.

The previous prime is 155303179. The next prime is 155303227. The reversal of 155303213 is 312303551.

155303213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29571844 + 125731369 = 5438^2 + 11213^2 .

It is a cyclic number.

It is not a de Polignac number, because 155303213 - 2¹² = 155299117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155303233) 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, 5973188 + ... + 5973213.

It is an arithmetic number, because the mean of its divisors is an integer number (41812407).

Almost surely, 2^155303213 is an apocalyptic number.

155303213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155303213 is a deficient number, since it is larger than the sum of its proper divisors (11946415).

155303213 is a wasteful number, since it uses less digits than its factorization.

155303213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946414.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 155303213 is about 12462.0709755642. The cubic root of 155303213 is about 537.5185793470.

Adding to 155303213 its reverse (312303551), we get a palindrome (467606764).

The spelling of 155303213 in words is "one hundred fifty-five million, three hundred three thousand, two hundred thirteen".