55319263 has 4 divisors (see below), whose sum is σ = 55808928. Its totient is φ = 54829600.

The previous prime is 55319249. The next prime is 55319267. The reversal of 55319263 is 36291355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55319263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55319267) 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, 244663 + ... + 244888.

It is an arithmetic number, because the mean of its divisors is an integer number (13952232).

Almost surely, 2^55319263 is an apocalyptic number.

55319263 is a deficient number, since it is larger than the sum of its proper divisors (489665).

55319263 is a wasteful number, since it uses less digits than its factorization.

55319263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489664.

The product of its digits is 24300, while the sum is 34.

The square root of 55319263 is about 7437.6920479407. The cubic root of 55319263 is about 381.0296704894.

The spelling of 55319263 in words is "fifty-five million, three hundred nineteen thousand, two hundred sixty-three".