55372213 has 16 divisors (see below), whose sum is σ = 66467520. Its totient is φ = 45570816.

The previous prime is 55372199. The next prime is 55372243. The reversal of 55372213 is 31227355.

It is not a de Polignac number, because 55372213 - 2¹⁷ = 55241141 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 (55372243) 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, 2395 + ... + 10792.

It is an arithmetic number, because the mean of its divisors is an integer number (4154220).

Almost surely, 2^55372213 is an apocalyptic number.

It is an amenable number.

55372213 is a deficient number, since it is larger than the sum of its proper divisors (11095307).

55372213 is a wasteful number, since it uses less digits than its factorization.

55372213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13236.

The product of its digits is 6300, while the sum is 28.

The square root of 55372213 is about 7441.2507685200. The cubic root of 55372213 is about 381.1512019189.

Adding to 55372213 its reverse (31227355), we get a palindrome (86599568).

It can be divided in two parts, 5537 and 2213, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 55372213 in words is "fifty-five million, three hundred seventy-two thousand, two hundred thirteen".