213315277 has 6 divisors (see below), whose sum is σ = 248142318. Its totient is φ = 182841624.

The previous prime is 213315257. The next prime is 213315313. The reversal of 213315277 is 772513312.

It can be written as a sum of positive squares in only one way, i.e., 184036356 + 29278921 = 13566^2 + 5411^2 .

It is a de Polignac number, because none of the positive numbers 2^k-213315277 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 (213315257) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2176638 + ... + 2176735.

It is an arithmetic number, because the mean of its divisors is an integer number (41357053).

Almost surely, 2^213315277 is an apocalyptic number.

It is an amenable number.

213315277 is a deficient number, since it is larger than the sum of its proper divisors (34827041).

213315277 is an equidigital number, since it uses as much as digits as its factorization.

213315277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4353387 (or 4353380 counting only the distinct ones).

The product of its digits is 8820, while the sum is 31.

The square root of 213315277 is about 14605.3167374076. The cubic root of 213315277 is about 597.5037745366.

Adding to 213315277 its reverse (772513312), we get a palindrome (985828589).

The spelling of 213315277 in words is "two hundred thirteen million, three hundred fifteen thousand, two hundred seventy-seven".