55620212 has 6 divisors (see below), whose sum is σ = 97335378. Its totient is φ = 27810104.

The previous prime is 55620203. The next prime is 55620263. The reversal of 55620212 is 21202655.

It can be written as a sum of positive squares in only one way, i.e., 46158436 + 9461776 = 6794^2 + 3076^2 .

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, 6952523 + ... + 6952530.

It is an arithmetic number, because the mean of its divisors is an integer number (16222563).

Almost surely, 2^55620212 is an apocalyptic number.

It is an amenable number.

55620212 is a deficient number, since it is larger than the sum of its proper divisors (41715166).

55620212 is a wasteful number, since it uses less digits than its factorization.

55620212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13905057 (or 13905055 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 55620212 is about 7457.8959499312. The cubic root of 55620212 is about 381.7193831021.

Adding to 55620212 its reverse (21202655), we get a palindrome (76822867).

The spelling of 55620212 in words is "fifty-five million, six hundred twenty thousand, two hundred twelve".