55157819 has 4 divisors (see below), whose sum is σ = 55175544. Its totient is φ = 55140096.

The previous prime is 55157813. The next prime is 55157821. The reversal of 55157819 is 91875155.

55157819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55157819 - 2⁴ = 55157803 is a prime.

It is a super-2 number, since 2×55157819² = 6084769993673522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55157813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2822 + ... + 10875.

It is an arithmetic number, because the mean of its divisors is an integer number (13793886).

Almost surely, 2^55157819 is an apocalyptic number.

55157819 is a deficient number, since it is larger than the sum of its proper divisors (17725).

55157819 is a wasteful number, since it uses less digits than its factorization.

55157819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17724.

The product of its digits is 63000, while the sum is 41.

The square root of 55157819 is about 7426.8310200246. The cubic root of 55157819 is about 380.6586430520.

The spelling of 55157819 in words is "fifty-five million, one hundred fifty-seven thousand, eight hundred nineteen".