55317619 has 6 divisors (see below), whose sum is σ = 64349124. Its totient is φ = 47415060.

The previous prime is 55317601. The next prime is 55317629. The reversal of 55317619 is 91671355.

It is not a de Polignac number, because 55317619 - 2¹⁹ = 54793331 is a prime.

It is a super-2 number, since 2×55317619² = 6120077943658322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55317629) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564417 + ... + 564514.

It is an arithmetic number, because the mean of its divisors is an integer number (10724854).

Almost surely, 2^55317619 is an apocalyptic number.

55317619 is a deficient number, since it is larger than the sum of its proper divisors (9031505).

55317619 is a wasteful number, since it uses less digits than its factorization.

55317619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128945 (or 1128938 counting only the distinct ones).

The product of its digits is 28350, while the sum is 37.

The square root of 55317619 is about 7437.5815289649. The cubic root of 55317619 is about 381.0258959213.

The spelling of 55317619 in words is "fifty-five million, three hundred seventeen thousand, six hundred nineteen".