2261555 has 8 divisors (see below), whose sum is σ = 2742432. Its totient is φ = 1790208.

The previous prime is 2261549. The next prime is 2261557. The reversal of 2261555 is 5551622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2261555 - 2¹⁴ = 2245171 is a prime.

It is a super-2 number, since 2×2261555² = 10229262036050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847 + ... + 2816.

It is an arithmetic number, because the mean of its divisors is an integer number (342804).

2^2261555 is an apocalyptic number.

2261555 is a deficient number, since it is larger than the sum of its proper divisors (480877).

2261555 is an equidigital number, since it uses as much as digits as its factorization.

2261555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765.

The product of its digits is 3000, while the sum is 26.

The square root of 2261555 is about 1503.8467342120. The cubic root of 2261555 is about 131.2610028569.

The spelling of 2261555 in words is "two million, two hundred sixty-one thousand, five hundred fifty-five".