55863519 has 16 divisors (see below), whose sum is σ = 77113344. Its totient is φ = 35935200.

The previous prime is 55863517. The next prime is 55863539. The reversal of 55863519 is 91536855.

It is not a de Polignac number, because 55863519 - 2¹ = 55863517 is a prime.

It is a super-2 number, since 2×55863519² = 6241465510126722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55863517) 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, 42222 + ... + 43524.

It is an arithmetic number, because the mean of its divisors is an integer number (4819584).

Almost surely, 2^55863519 is an apocalyptic number.

55863519 is a deficient number, since it is larger than the sum of its proper divisors (21249825).

55863519 is a wasteful number, since it uses less digits than its factorization.

55863519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798.

The product of its digits is 162000, while the sum is 42.

The square root of 55863519 is about 7474.1901902480. The cubic root of 55863519 is about 382.2751756671.

The spelling of 55863519 in words is "fifty-five million, eight hundred sixty-three thousand, five hundred nineteen".