55155319 has 4 divisors (see below), whose sum is σ = 55180096. Its totient is φ = 55130544.

The previous prime is 55155307. The next prime is 55155343. The reversal of 55155319 is 91355155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91355155 = 5 ⋅18271031.

It is a cyclic number.

It is not a de Polignac number, because 55155319 - 2⁹ = 55154807 is a prime.

It is a super-2 number, since 2×55155319² = 6084218427983522, 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 (55155349) 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, 8679 + ... + 13624.

It is an arithmetic number, because the mean of its divisors is an integer number (13795024).

Almost surely, 2^55155319 is an apocalyptic number.

55155319 is a deficient number, since it is larger than the sum of its proper divisors (24777).

55155319 is a wasteful number, since it uses less digits than its factorization.

55155319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24776.

The product of its digits is 16875, while the sum is 34.

The square root of 55155319 is about 7426.6627094544. The cubic root of 55155319 is about 380.6528919122.

The spelling of 55155319 in words is "fifty-five million, one hundred fifty-five thousand, three hundred nineteen".