55015222 has 16 divisors (see below), whose sum is σ = 87917760. Its totient is φ = 25744392.

The previous prime is 55015217. The next prime is 55015223. The reversal of 55015222 is 22251055.

It is a junction number, because it is equal to n+sod(n) for n = 55015193 and 55015202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55015223) 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, 5568 + ... + 11875.

It is an arithmetic number, because the mean of its divisors is an integer number (5494860).

Almost surely, 2^55015222 is an apocalyptic number.

55015222 is a deficient number, since it is larger than the sum of its proper divisors (32902538).

55015222 is a wasteful number, since it uses less digits than its factorization.

55015222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17547.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 55015222 is about 7417.2246831278. The cubic root of 55015222 is about 380.3303268050.

Adding to 55015222 its reverse (22251055), we get a palindrome (77266277).

The spelling of 55015222 in words is "fifty-five million, fifteen thousand, two hundred twenty-two".