155213 has 4 divisors (see below), whose sum is σ = 156060. Its totient is φ = 154368.

The previous prime is 155209. The next prime is 155219. The reversal of 155213 is 312551.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 91204 + 64009 = 302^2 + 253^2 .

It is a cyclic number.

It is not a de Polignac number, because 155213 - 2² = 155209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155191 and 155200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155219) 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, 20 + ... + 557.

It is an arithmetic number, because the mean of its divisors is an integer number (39015).

2¹⁵⁵²¹³ is an apocalyptic number.

It is an amenable number.

155213 is a deficient number, since it is larger than the sum of its proper divisors (847).

155213 is an equidigital number, since it uses as much as digits as its factorization.

155213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846.

The product of its digits is 150, while the sum is 17.

The square root of 155213 is about 393.9708111015. The cubic root of 155213 is about 53.7414480715.

Adding to 155213 its reverse (312551), we get a palindrome (467764).

The spelling of 155213 in words is "one hundred fifty-five thousand, two hundred thirteen".