2291953 has 4 divisors (see below), whose sum is σ = 2329588. Its totient is φ = 2254320.

The previous prime is 2291929. The next prime is 2291959. The reversal of 2291953 is 3591922.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3591922 = 2 ⋅1795961.

It can be written as a sum of positive squares in 2 ways, for example, as 1140624 + 1151329 = 1068^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 2291953 - 2⁵ = 2291921 is a prime.

It is a Duffinian number.

2291953 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2291959) 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, 18726 + ... + 18847.

It is an arithmetic number, because the mean of its divisors is an integer number (582397).

2^2291953 is an apocalyptic number.

It is an amenable number.

2291953 is a deficient number, since it is larger than the sum of its proper divisors (37635).

2291953 is an equidigital number, since it uses as much as digits as its factorization.

2291953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37634.

The product of its digits is 4860, while the sum is 31.

The square root of 2291953 is about 1513.9197468822. The cubic root of 2291953 is about 131.8464889736.

Subtracting from 2291953 its sum of digits (31), we obtain a palindrome (2291922).

The spelling of 2291953 in words is "two million, two hundred ninety-one thousand, nine hundred fifty-three".