2261623 has 16 divisors (see below), whose sum is σ = 2882880. Its totient is φ = 1725696.

The previous prime is 2261621. The next prime is 2261639. The reversal of 2261623 is 3261622.

It is a happy number.

It is not a de Polignac number, because 2261623 - 2¹ = 2261621 is a prime.

It is a super-2 number, since 2×2261623² = 10229877188258, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2261594 and 2261603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2211 + ... + 3067.

It is an arithmetic number, because the mean of its divisors is an integer number (180180).

2^2261623 is an apocalyptic number.

2261623 is a deficient number, since it is larger than the sum of its proper divisors (621257).

2261623 is a wasteful number, since it uses less digits than its factorization.

2261623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906.

The product of its digits is 864, while the sum is 22.

The square root of 2261623 is about 1503.8693427289. The cubic root of 2261623 is about 131.2623184205.

Subtracting 2261623 from its reverse (3261622), we obtain a palindrome (999999).

It can be divided in two parts, 226 and 1623, that added together give a square (1849 = 43²).

The spelling of 2261623 in words is "two million, two hundred sixty-one thousand, six hundred twenty-three".