19955255 has 4 divisors (see below), whose sum is σ = 23946312. Its totient is φ = 15964200.

The previous prime is 19955249. The next prime is 19955261. The reversal of 19955255 is 55255991.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (19955249) and next prime (19955261).

It is not a de Polignac number, because 19955255 - 2⁴ = 19955239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995521 + ... + 1995530.

It is an arithmetic number, because the mean of its divisors is an integer number (5986578).

Almost surely, 2^19955255 is an apocalyptic number.

19955255 is a deficient number, since it is larger than the sum of its proper divisors (3991057).

19955255 is an equidigital number, since it uses as much as digits as its factorization.

19955255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3991056.

The product of its digits is 101250, while the sum is 41.

The square root of 19955255 is about 4467.1305107418. The cubic root of 19955255 is about 271.2391828174.

The spelling of 19955255 in words is "nineteen million, nine hundred fifty-five thousand, two hundred fifty-five".