55031216 has 20 divisors (see below), whose sum is σ = 106779624. Its totient is φ = 27475200.

The previous prime is 55031191. The next prime is 55031237. The reversal of 55031216 is 61213055.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55031191 and 55031200.

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, 10856 + ... + 15096.

Almost surely, 2^55031216 is an apocalyptic number.

It is an amenable number.

55031216 is a deficient number, since it is larger than the sum of its proper divisors (51748408).

55031216 is a wasteful number, since it uses less digits than its factorization.

55031216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5060 (or 5054 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55031216 is about 7418.3027708499. The cubic root of 55031216 is about 380.3671797198.

The spelling of 55031216 in words is "fifty-five million, thirty-one thousand, two hundred sixteen".