255630213 has 12 divisors (see below), whose sum is σ = 369959148. Its totient is φ = 170089920.

The previous prime is 255630209. The next prime is 255630217. The reversal of 255630213 is 312036552.

255630213 is a `hidden beast` number, since 2 + 5 + 5 + 630 + 21 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (255630209) and next prime (255630217).

It can be written as a sum of positive squares in 2 ways, for example, as 162256644 + 93373569 = 12738^2 + 9663^2 .

It is not a de Polignac number, because 255630213 - 2² = 255630209 is a prime.

It is a super-3 number, since 3×255630213³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255630217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22570 + ... + 31947.

It is an arithmetic number, because the mean of its divisors is an integer number (30829929).

Almost surely, 2^255630213 is an apocalyptic number.

It is an amenable number.

255630213 is a deficient number, since it is larger than the sum of its proper divisors (114328935).

255630213 is a wasteful number, since it uses less digits than its factorization.

255630213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55044 (or 55041 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 255630213 is about 15988.4399801857. The cubic root of 255630213 is about 634.6545441536.

Adding to 255630213 its reverse (312036552), we get a palindrome (567666765).

The spelling of 255630213 in words is "two hundred fifty-five million, six hundred thirty thousand, two hundred thirteen".