55783403 has 4 divisors (see below), whose sum is σ = 60074448. Its totient is φ = 51492360.

The previous prime is 55783397. The next prime is 55783433. The reversal of 55783403 is 30438755.

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 55783403 - 2¹⁸ = 55521259 is a prime.

It is a super-2 number, since 2×55783403² = 6223576100520818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55783433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145503 + ... + 2145528.

It is an arithmetic number, because the mean of its divisors is an integer number (15018612).

Almost surely, 2^55783403 is an apocalyptic number.

55783403 is a deficient number, since it is larger than the sum of its proper divisors (4291045).

55783403 is a wasteful number, since it uses less digits than its factorization.

55783403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291044.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 55783403 is about 7468.8287569069. The cubic root of 55783403 is about 382.0923431078.

The spelling of 55783403 in words is "fifty-five million, seven hundred eighty-three thousand, four hundred three".