55640122 has 4 divisors (see below), whose sum is σ = 83460186. Its totient is φ = 27820060.

The previous prime is 55640111. The next prime is 55640131. The reversal of 55640122 is 22104655.

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., 55338721 + 301401 = 7439^2 + 549^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13910029 + ... + 13910032.

Almost surely, 2^55640122 is an apocalyptic number.

55640122 is a deficient number, since it is larger than the sum of its proper divisors (27820064).

55640122 is a wasteful number, since it uses less digits than its factorization.

55640122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27820063.

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

The square root of 55640122 is about 7459.2306573802. The cubic root of 55640122 is about 381.7649248574.

Adding to 55640122 its reverse (22104655), we get a palindrome (77744777).

The spelling of 55640122 in words is "fifty-five million, six hundred forty thousand, one hundred twenty-two".