55403319 has 8 divisors (see below), whose sum is σ = 75867760. Its totient is φ = 35937216.

The previous prime is 55403287. The next prime is 55403321. The reversal of 55403319 is 91330455.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55403319 - 2⁵ = 55403287 is a prime.

It is a super-2 number, since 2×55403319² = 6139055512431522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55403329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249454 + ... + 249675.

It is an arithmetic number, because the mean of its divisors is an integer number (9483470).

Almost surely, 2^55403319 is an apocalyptic number.

55403319 is a deficient number, since it is larger than the sum of its proper divisors (20464441).

55403319 is a wasteful number, since it uses less digits than its factorization.

55403319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499169.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 55403319 is about 7443.3405806802. The cubic root of 55403319 is about 381.2225606338. Note that the first 3 decimals are identical.

The spelling of 55403319 in words is "fifty-five million, four hundred three thousand, three hundred nineteen".