2231553 has 4 divisors (see below), whose sum is σ = 2975408. Its totient is φ = 1487700.

The previous prime is 2231533. The next prime is 2231587. The reversal of 2231553 is 3551322.

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 not a de Polignac number, because 2231553 - 2⁸ = 2231297 is a prime.

It is a super-3 number, since 3×2231553³ = 33338255639543248131, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2231533) 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, 371923 + ... + 371928.

It is an arithmetic number, because the mean of its divisors is an integer number (743852).

2^2231553 is an apocalyptic number.

It is an amenable number.

2231553 is a deficient number, since it is larger than the sum of its proper divisors (743855).

2231553 is an equidigital number, since it uses as much as digits as its factorization.

2231553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743854.

The product of its digits is 900, while the sum is 21.

The square root of 2231553 is about 1493.8383446679. The cubic root of 2231553 is about 130.6779768022.

Adding to 2231553 its reverse (3551322), we get a palindrome (5782875).

The spelling of 2231553 in words is "two million, two hundred thirty-one thousand, five hundred fifty-three".