305505213 has 16 divisors (see below), whose sum is σ = 438996096. Its totient is φ = 187865280.

The previous prime is 305505203. The next prime is 305505241. The reversal of 305505213 is 312505503.

It is not a de Polignac number, because 305505213 - 2⁶ = 305505149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305505203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84856 + ... + 88382.

It is an arithmetic number, because the mean of its divisors is an integer number (27437256).

Almost surely, 2^305505213 is an apocalyptic number.

It is an amenable number.

305505213 is a deficient number, since it is larger than the sum of its proper divisors (133490883).

305505213 is a wasteful number, since it uses less digits than its factorization.

305505213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5764.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 305505213 is about 17478.7074178842. The cubic root of 305505213 is about 673.5030111599.

The spelling of 305505213 in words is "three hundred five million, five hundred five thousand, two hundred thirteen".