55029919 has 4 divisors (see below), whose sum is σ = 62891344. Its totient is φ = 47168496.

The previous prime is 55029917. The next prime is 55029937. The reversal of 55029919 is 91992055.

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 55029919 - 2¹ = 55029917 is a prime.

It is a super-2 number, since 2×55029919² = 6056583970293122, 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 (55029917) 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, 3930702 + ... + 3930715.

It is an arithmetic number, because the mean of its divisors is an integer number (15722836).

Almost surely, 2^55029919 is an apocalyptic number.

55029919 is a deficient number, since it is larger than the sum of its proper divisors (7861425).

55029919 is an equidigital number, since it uses as much as digits as its factorization.

55029919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861424.

The product of its (nonzero) digits is 36450, while the sum is 40.

The square root of 55029919 is about 7418.2153514171. The cubic root of 55029919 is about 380.3641914758.

The spelling of 55029919 in words is "fifty-five million, twenty-nine thousand, nine hundred nineteen".