55616903 has 4 divisors (see below), whose sum is σ = 55726680. Its totient is φ = 55507128.

The previous prime is 55616893. The next prime is 55616909. The reversal of 55616903 is 30961655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30961655 = 5 ⋅6192331.

It is a cyclic number.

It is not a de Polignac number, because 55616903 - 2⁴ = 55616887 is a prime.

It is a super-2 number, since 2×55616903² = 6186479798622818, 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 (55616909) 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, 54125 + ... + 55142.

It is an arithmetic number, because the mean of its divisors is an integer number (13931670).

Almost surely, 2^55616903 is an apocalyptic number.

55616903 is a deficient number, since it is larger than the sum of its proper divisors (109777).

55616903 is a wasteful number, since it uses less digits than its factorization.

55616903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109776.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 55616903 is about 7457.6741012195. The cubic root of 55616903 is about 381.7118131052.

The spelling of 55616903 in words is "fifty-five million, six hundred sixteen thousand, nine hundred three".