55681851 has 16 divisors (see below), whose sum is σ = 79030944. Its totient is φ = 34750464.

The previous prime is 55681831. The next prime is 55681883. The reversal of 55681851 is 15818655.

It is not a de Polignac number, because 55681851 - 2⁵ = 55681819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55681831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7015 + ... + 12671.

It is an arithmetic number, because the mean of its divisors is an integer number (4939434).

Almost surely, 2^55681851 is an apocalyptic number.

55681851 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55681851 is a deficient number, since it is larger than the sum of its proper divisors (23349093).

55681851 is a wasteful number, since it uses less digits than its factorization.

55681851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870.

The product of its digits is 48000, while the sum is 39.

The square root of 55681851 is about 7462.0272714591. The cubic root of 55681851 is about 381.8603397431.

The spelling of 55681851 in words is "fifty-five million, six hundred eighty-one thousand, eight hundred fifty-one".