19228961 has 4 divisors (see below), whose sum is σ = 19258800. Its totient is φ = 19199124.

The previous prime is 19228949. The next prime is 19228981. The reversal of 19228961 is 16982291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19228961 - 2¹⁴ = 19212577 is a prime.

It is a super-2 number, since 2×19228961² = 739505882279042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19228981) 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, 13931 + ... + 15248.

It is an arithmetic number, because the mean of its divisors is an integer number (4814700).

Almost surely, 2^19228961 is an apocalyptic number.

It is an amenable number.

19228961 is a deficient number, since it is larger than the sum of its proper divisors (29839).

19228961 is an equidigital number, since it uses as much as digits as its factorization.

19228961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29838.

The product of its digits is 15552, while the sum is 38.

The square root of 19228961 is about 4385.0839216599. The cubic root of 19228961 is about 267.9077474489.

The spelling of 19228961 in words is "nineteen million, two hundred twenty-eight thousand, nine hundred sixty-one".