55861319 has 4 divisors (see below), whose sum is σ = 58290096. Its totient is φ = 53432544.

The previous prime is 55861313. The next prime is 55861321. The reversal of 55861319 is 91316855.

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 55861319 - 2⁸ = 55861063 is a prime.

It is a super-2 number, since 2×55861319² = 6240973920839522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55861313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214354 + ... + 1214399.

It is an arithmetic number, because the mean of its divisors is an integer number (14572524).

Almost surely, 2^55861319 is an apocalyptic number.

55861319 is a deficient number, since it is larger than the sum of its proper divisors (2428777).

55861319 is a wasteful number, since it uses less digits than its factorization.

55861319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428776.

The product of its digits is 32400, while the sum is 38.

The square root of 55861319 is about 7474.0430156643. The cubic root of 55861319 is about 382.2701573866.

The spelling of 55861319 in words is "fifty-five million, eight hundred sixty-one thousand, three hundred nineteen".