55263619 has 4 divisors (see below), whose sum is σ = 55427944. Its totient is φ = 55099296.

The previous prime is 55263563. The next prime is 55263623. The reversal of 55263619 is 91636255.

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

It is a cyclic number.

It is not a de Polignac number, because 55263619 - 2⁷ = 55263491 is a prime.

It is a super-2 number, since 2×55263619² = 6108135169954322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55263679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81657 + ... + 82330.

It is an arithmetic number, because the mean of its divisors is an integer number (13856986).

Almost surely, 2^55263619 is an apocalyptic number.

55263619 is a deficient number, since it is larger than the sum of its proper divisors (164325).

55263619 is a wasteful number, since it uses less digits than its factorization.

55263619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164324.

The product of its digits is 48600, while the sum is 37.

The square root of 55263619 is about 7433.9504302894. The cubic root of 55263619 is about 380.9018721624.

The spelling of 55263619 in words is "fifty-five million, two hundred sixty-three thousand, six hundred nineteen".