55022146 has 4 divisors (see below), whose sum is σ = 82533222. Its totient is φ = 27511072.

The previous prime is 55022129. The next prime is 55022147. The reversal of 55022146 is 64122055.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54922921 + 99225 = 7411^2 + 315^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55022146.

It is not an unprimeable number, because it can be changed into a prime (55022147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13755535 + ... + 13755538.

Almost surely, 2^55022146 is an apocalyptic number.

55022146 is a deficient number, since it is larger than the sum of its proper divisors (27511076).

55022146 is a wasteful number, since it uses less digits than its factorization.

55022146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27511075.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55022146 is about 7417.6914198422. The cubic root of 55022146 is about 380.3462817633.

Subtracting 55022146 from its reverse (64122055), we obtain a palindrome (9099909).

The spelling of 55022146 in words is "fifty-five million, twenty-two thousand, one hundred forty-six".