2259931 has 4 divisors (see below), whose sum is σ = 2332864. Its totient is φ = 2187000.

The previous prime is 2259919. The next prime is 2259937. The reversal of 2259931 is 1399522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1399522 = 2 ⋅699761.

It is a 7-Lehmer number, since φ(2259931) divides (2259931-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 2259931 - 2¹¹ = 2257883 is a prime.

It is a super-2 number, since 2×2259931² = 10214576249522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 72901 = 2259931 / (2 + 2 + 5 + 9 + 9 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2259893 and 2259902.

It is not an unprimeable number, because it can be changed into a prime (2259937) 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, 36420 + ... + 36481.

It is an arithmetic number, because the mean of its divisors is an integer number (583216).

2^2259931 is an apocalyptic number.

2259931 is a deficient number, since it is larger than the sum of its proper divisors (72933).

2259931 is an equidigital number, since it uses as much as digits as its factorization.

2259931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72932.

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

The square root of 2259931 is about 1503.3066886035. The cubic root of 2259931 is about 131.2295762627.

It can be divided in two parts, 22599 and 31, that multiplied together give a square (700569 = 837²).

The spelling of 2259931 in words is "two million, two hundred fifty-nine thousand, nine hundred thirty-one".