55222520 has 16 divisors (see below), whose sum is σ = 124250760. Its totient is φ = 22088992.

The previous prime is 55222513. The next prime is 55222549. The reversal of 55222520 is 2522255.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690242 + ... + 690321.

Almost surely, 2^55222520 is an apocalyptic number.

It is an amenable number.

55222520 is an abundant number, since it is smaller than the sum of its proper divisors (69028240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55222520 is a wasteful number, since it uses less digits than its factorization.

55222520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380574 (or 1380570 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 55222520 is about 7431.1856389139. The cubic root of 55222520 is about 380.8074244427.

Adding to 55222520 its reverse (2522255), we get a palindrome (57744775).

The spelling of 55222520 in words is "fifty-five million, two hundred twenty-two thousand, five hundred twenty".