55780103 has 4 divisors (see below), whose sum is σ = 56544288. Its totient is φ = 55015920.

The previous prime is 55780099. The next prime is 55780121. The reversal of 55780103 is 30108755.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30108755 = 5 ⋅6021751.

It is a cyclic number.

It is not a de Polignac number, because 55780103 - 2² = 55780099 is a prime.

It is a super-2 number, since 2×55780103² = 6222839781381218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55780133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381983 + ... + 382128.

It is an arithmetic number, because the mean of its divisors is an integer number (14136072).

Almost surely, 2^55780103 is an apocalyptic number.

55780103 is a deficient number, since it is larger than the sum of its proper divisors (764185).

55780103 is an equidigital number, since it uses as much as digits as its factorization.

55780103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764184.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 55780103 is about 7468.6078354671. The cubic root of 55780103 is about 382.0848084318.

Adding to 55780103 its reverse (30108755), we get a palindrome (85888858).

The spelling of 55780103 in words is "fifty-five million, seven hundred eighty thousand, one hundred three".