55810851 has 4 divisors (see below), whose sum is σ = 74414472. Its totient is φ = 37207232.

The previous prime is 55810841. The next prime is 55810889. The reversal of 55810851 is 15801855.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55810851 - 2⁶ = 55810787 is a prime.

It is a super-2 number, since 2×55810851² = 6229702178688402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55810841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9301806 + ... + 9301811.

It is an arithmetic number, because the mean of its divisors is an integer number (18603618).

Almost surely, 2^55810851 is an apocalyptic number.

55810851 is a deficient number, since it is larger than the sum of its proper divisors (18603621).

55810851 is a wasteful number, since it uses less digits than its factorization.

55810851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18603620.

The product of its (nonzero) digits is 8000, while the sum is 33.

The square root of 55810851 is about 7470.6660345648. Note that the first 3 decimals coincide. The cubic root of 55810851 is about 382.1550018342.

The spelling of 55810851 in words is "fifty-five million, eight hundred ten thousand, eight hundred fifty-one".