55249816 has 16 divisors (see below), whose sum is σ = 105798240. Its totient is φ = 27036960.

The previous prime is 55249801. The next prime is 55249823. The reversal of 55249816 is 61894255.

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, 73095 + ... + 73846.

It is an arithmetic number, because the mean of its divisors is an integer number (6612390).

Almost surely, 2^55249816 is an apocalyptic number.

It is an amenable number.

55249816 is a deficient number, since it is larger than the sum of its proper divisors (50548424).

55249816 is a wasteful number, since it uses less digits than its factorization.

55249816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146994 (or 146990 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 55249816 is about 7433.0219964695. The cubic root of 55249816 is about 380.8701573476.

It can be divided in two parts, 55249 and 816, that added together give a palindrome (56065).

The spelling of 55249816 in words is "fifty-five million, two hundred forty-nine thousand, eight hundred sixteen".