55624319 has 4 divisors (see below), whose sum is σ = 55639320. Its totient is φ = 55609320.

The previous prime is 55624297. The next prime is 55624339. The reversal of 55624319 is 91342655.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 91342655 = 5 ⋅18268531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55624319 is a prime.

It is a super-2 number, since 2×55624319² = 6188129728427522, 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 (55624339) 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, 2564 + ... + 10854.

It is an arithmetic number, because the mean of its divisors is an integer number (13909830).

Almost surely, 2^55624319 is an apocalyptic number.

55624319 is a deficient number, since it is larger than the sum of its proper divisors (15001).

55624319 is an equidigital number, since it uses as much as digits as its factorization.

55624319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15000.

The product of its digits is 32400, while the sum is 35.

The square root of 55624319 is about 7458.1712906047. The cubic root of 55624319 is about 381.7287782654.

The spelling of 55624319 in words is "fifty-five million, six hundred twenty-four thousand, three hundred nineteen".