55255213 has 8 divisors (see below), whose sum is σ = 59591448. Its totient is φ = 50931264.

The previous prime is 55255201. The next prime is 55255217. The reversal of 55255213 is 31255255.

It can be written as a sum of positive squares in 4 ways, for example, as 15350724 + 39904489 = 3918^2 + 6317^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55255213 - 2⁹ = 55254701 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 (55255217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7695 + ... + 13027.

It is an arithmetic number, because the mean of its divisors is an integer number (7448931).

Almost surely, 2^55255213 is an apocalyptic number.

It is an amenable number.

55255213 is a deficient number, since it is larger than the sum of its proper divisors (4336235).

55255213 is a wasteful number, since it uses less digits than its factorization.

55255213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6143.

The product of its digits is 7500, while the sum is 28.

The square root of 55255213 is about 7433.3850297156. The cubic root of 55255213 is about 380.8825585311.

The spelling of 55255213 in words is "fifty-five million, two hundred fifty-five thousand, two hundred thirteen".