2261431 has 4 divisors (see below), whose sum is σ = 2265592. Its totient is φ = 2257272.

The previous prime is 2261407. The next prime is 2261447. The reversal of 2261431 is 1341622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1341622 = 2 ⋅670811.

It is a cyclic number.

It is not a de Polignac number, because 2261431 - 2⁹ = 2260919 is a prime.

It is a super-2 number, since 2×2261431² = 10228140335522, which contains 22 as substring.

It is a Duffinian number.

2261431 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2261399 and 2261408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261461) 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, 1116 + ... + 2401.

It is an arithmetic number, because the mean of its divisors is an integer number (566398).

2^2261431 is an apocalyptic number.

2261431 is a deficient number, since it is larger than the sum of its proper divisors (4161).

2261431 is an equidigital number, since it uses as much as digits as its factorization.

2261431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160.

The product of its digits is 288, while the sum is 19.

The square root of 2261431 is about 1503.8055060413. The cubic root of 2261431 is about 131.2586038200.

The spelling of 2261431 in words is "two million, two hundred sixty-one thousand, four hundred thirty-one".