55322278 has 32 divisors (see below), whose sum is σ = 92736000. Its totient is φ = 24541920.

The previous prime is 55322269. The next prime is 55322287. The reversal of 55322278 is 87222355.

It is an interprime number because it is at equal distance from previous prime (55322269) and next prime (55322287).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241468 + ... + 241696.

It is an arithmetic number, because the mean of its divisors is an integer number (2898000).

Almost surely, 2^55322278 is an apocalyptic number.

55322278 is a deficient number, since it is larger than the sum of its proper divisors (37413722).

55322278 is a wasteful number, since it uses less digits than its factorization.

55322278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460.

The product of its digits is 33600, while the sum is 34.

The square root of 55322278 is about 7437.8947290211. The cubic root of 55322278 is about 381.0365926327.

The spelling of 55322278 in words is "fifty-five million, three hundred twenty-two thousand, two hundred seventy-eight".