55209419 has 8 divisors (see below), whose sum is σ = 57108480. Its totient is φ = 53317800.

The previous prime is 55209409. The next prime is 55209433. The reversal of 55209419 is 91490255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55209419 - 2⁴ = 55209403 is a prime.

It is a super-2 number, since 2×55209419² = 6096159892635122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55209409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16142 + ... + 19260.

It is an arithmetic number, because the mean of its divisors is an integer number (7138560).

Almost surely, 2^55209419 is an apocalyptic number.

55209419 is a deficient number, since it is larger than the sum of its proper divisors (1899061).

55209419 is a wasteful number, since it uses less digits than its factorization.

55209419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 55209419 is about 7430.3040987567. The cubic root of 55209419 is about 380.7773077883. Note that the first 3 decimals are identical.

The spelling of 55209419 in words is "fifty-five million, two hundred nine thousand, four hundred nineteen".