55222313 has 2 divisors, whose sum is σ = 55222314. Its totient is φ = 55222312.

The previous prime is 55222291. The next prime is 55222327. The reversal of 55222313 is 31322255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54361129 + 861184 = 7373^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 55222313 - 2¹² = 55218217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (55222513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611156 + 27611157.

It is an arithmetic number, because the mean of its divisors is an integer number (27611157).

Almost surely, 2^55222313 is an apocalyptic number.

It is an amenable number.

55222313 is a deficient number, since it is larger than the sum of its proper divisors (1).

55222313 is an equidigital number, since it uses as much as digits as its factorization.

55222313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 23.

The square root of 55222313 is about 7431.1717111099. The cubic root of 55222313 is about 380.8069486270.

Adding to 55222313 its reverse (31322255), we get a palindrome (86544568).

The spelling of 55222313 in words is "fifty-five million, two hundred twenty-two thousand, three hundred thirteen".