55861069 has 4 divisors (see below), whose sum is σ = 60939360. Its totient is φ = 50782780.

The previous prime is 55861063. The next prime is 55861073. The reversal of 55861069 is 96016855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55861069 - 2³ = 55861061 is a prime.

It is a super-2 number, since 2×55861069² = 6240918059645522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55861061) 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, 2539129 + ... + 2539150.

It is an arithmetic number, because the mean of its divisors is an integer number (15234840).

Almost surely, 2^55861069 is an apocalyptic number.

It is an amenable number.

55861069 is a deficient number, since it is larger than the sum of its proper divisors (5078291).

55861069 is a wasteful number, since it uses less digits than its factorization.

55861069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5078290.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 55861069 is about 7474.0262910964. The cubic root of 55861069 is about 382.2695871191.

The spelling of 55861069 in words is "fifty-five million, eight hundred sixty-one thousand, sixty-nine".