2191553 has 8 divisors (see below), whose sum is σ = 2697408. Its totient is φ = 1733904.

The previous prime is 2191549. The next prime is 2191561. The reversal of 2191553 is 3551912.

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 2191553 - 2² = 2191549 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2191513) 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, 11951 + ... + 12132.

It is an arithmetic number, because the mean of its divisors is an integer number (337176).

2^2191553 is an apocalyptic number.

It is an amenable number.

2191553 is a deficient number, since it is larger than the sum of its proper divisors (505855).

2191553 is a wasteful number, since it uses less digits than its factorization.

2191553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24103.

The product of its digits is 1350, while the sum is 26.

The square root of 2191553 is about 1480.3894757799. The cubic root of 2191553 is about 129.8924751918.

It can be divided in two parts, 2191 and 553, that added together give a cube (2744 = 14³).

The spelling of 2191553 in words is "two million, one hundred ninety-one thousand, five hundred fifty-three".