55101866 has 4 divisors (see below), whose sum is σ = 82652802. Its totient is φ = 27550932.

The previous prime is 55101853. The next prime is 55101869. The reversal of 55101866 is 66810155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66810155 = 5 ⋅13362031.

It can be written as a sum of positive squares in only one way, i.e., 55071241 + 30625 = 7421^2 + 175^2 .

It is not an unprimeable number, because it can be changed into a prime (55101869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13775465 + ... + 13775468.

Almost surely, 2^55101866 is an apocalyptic number.

55101866 is a deficient number, since it is larger than the sum of its proper divisors (27550936).

55101866 is a wasteful number, since it uses less digits than its factorization.

55101866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27550935.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 55101866 is about 7423.0631143754. The cubic root of 55101866 is about 380.5298840382.

The spelling of 55101866 in words is "fifty-five million, one hundred one thousand, eight hundred sixty-six".