55783203 has 16 divisors (see below), whose sum is σ = 85188096. Its totient is φ = 31806720.

The previous prime is 55783159. The next prime is 55783213. The reversal of 55783203 is 30238755.

55783203 is a nontrivial binomial coefficient, being equal to C(10563, 2).

It is not a de Polignac number, because 55783203 - 2⁹ = 55782691 is a prime.

It is a super-2 number, since 2×55783203² = 6223531473878418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55783213) 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, 7923 + ... + 13203.

It is an arithmetic number, because the mean of its divisors is an integer number (5324256).

Almost surely, 2^55783203 is an apocalyptic number.

55783203 is the 10562-nd triangular number.

55783203 is a deficient number, since it is larger than the sum of its proper divisors (29404893).

55783203 is a wasteful number, since it uses less digits than its factorization.

55783203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 55783203 is about 7468.8153679148. The cubic root of 55783203 is about 382.0918864692.

The spelling of 55783203 in words is "fifty-five million, seven hundred eighty-three thousand, two hundred three".