2563919 has 4 divisors (see below), whose sum is σ = 2652360. Its totient is φ = 2475480.

The previous prime is 2563909. The next prime is 2563921. The reversal of 2563919 is 9193652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2563919 is a prime.

It is a super-2 number, since 2×2563919² = 13147361277122, 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 (2563909) 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, 44177 + ... + 44234.

It is an arithmetic number, because the mean of its divisors is an integer number (663090).

2^2563919 is an apocalyptic number.

2563919 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2563919 is a deficient number, since it is larger than the sum of its proper divisors (88441).

2563919 is an equidigital number, since it uses as much as digits as its factorization.

2563919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88440.

The product of its digits is 14580, while the sum is 35.

The square root of 2563919 is about 1601.2242191523. The cubic root of 2563919 is about 136.8678463488.

The spelling of 2563919 in words is "two million, five hundred sixty-three thousand, nine hundred nineteen".