55185422 has 4 divisors (see below), whose sum is σ = 82778136. Its totient is φ = 27592710.

The previous prime is 55185409. The next prime is 55185479. The reversal of 55185422 is 22458155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22458155 = 5 ⋅4491631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13796354 + ... + 13796357.

It is an arithmetic number, because the mean of its divisors is an integer number (20694534).

Almost surely, 2^55185422 is an apocalyptic number.

55185422 is a deficient number, since it is larger than the sum of its proper divisors (27592714).

55185422 is a wasteful number, since it uses less digits than its factorization.

55185422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27592713.

The product of its digits is 16000, while the sum is 32.

The square root of 55185422 is about 7428.6891171996. The cubic root of 55185422 is about 380.7221309880.

The spelling of 55185422 in words is "fifty-five million, one hundred eighty-five thousand, four hundred twenty-two".