55419861 has 8 divisors (see below), whose sum is σ = 84449344. Its totient is φ = 31668480.

The previous prime is 55419839. The next prime is 55419863. The reversal of 55419861 is 16891455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55419861 - 2¹⁵ = 55387093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55419863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1319500 + ... + 1319541.

It is an arithmetic number, because the mean of its divisors is an integer number (10556168).

Almost surely, 2^55419861 is an apocalyptic number.

It is an amenable number.

55419861 is a deficient number, since it is larger than the sum of its proper divisors (29029483).

55419861 is a wasteful number, since it uses less digits than its factorization.

55419861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639051.

The product of its digits is 43200, while the sum is 39.

The square root of 55419861 is about 7444.4516923679. The cubic root of 55419861 is about 381.2604979283.

It can be divided in two parts, 55419 and 861, that added together give a triangular number (56280 = T₃₃₅).

The spelling of 55419861 in words is "fifty-five million, four hundred nineteen thousand, eight hundred sixty-one".