55780503 has 16 divisors (see below), whose sum is σ = 76369920. Its totient is φ = 36195264.

The previous prime is 55780489. The next prime is 55780513. The reversal of 55780503 is 30508755.

55780503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-55780503 is a prime.

It is a super-2 number, since 2×55780503² = 6222929029866018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48843 + ... + 49971.

It is an arithmetic number, because the mean of its divisors is an integer number (4773120).

Almost surely, 2^55780503 is an apocalyptic number.

55780503 is a deficient number, since it is larger than the sum of its proper divisors (20589417).

55780503 is a wasteful number, since it uses less digits than its factorization.

55780503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558.

The product of its (nonzero) digits is 21000, while the sum is 33.

The square root of 55780503 is about 7468.6346141715. The cubic root of 55780503 is about 382.0857217417.

The spelling of 55780503 in words is "fifty-five million, seven hundred eighty thousand, five hundred three".