55222013 has 16 divisors (see below), whose sum is σ = 69402624. Its totient is φ = 42683760.

The previous prime is 55222009. The next prime is 55222043. The reversal of 55222013 is 31022255.

It is not a de Polignac number, because 55222013 - 2² = 55222009 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 (55222043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6956 + ... + 12602.

It is an arithmetic number, because the mean of its divisors is an integer number (4337664).

Almost surely, 2^55222013 is an apocalyptic number.

It is an amenable number.

55222013 is a deficient number, since it is larger than the sum of its proper divisors (14180611).

55222013 is a wasteful number, since it uses less digits than its factorization.

55222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5792.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 55222013 is about 7431.1515258404. The cubic root of 55222013 is about 380.8062590368.

Adding to 55222013 its reverse (31022255), we get a palindrome (86244268).

The spelling of 55222013 in words is "fifty-five million, two hundred twenty-two thousand, thirteen".