2261651 has 4 divisors (see below), whose sum is σ = 2584752. Its totient is φ = 1938552.

The previous prime is 2261639. The next prime is 2261653. The reversal of 2261651 is 1561622.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2261651 - 2⁶ = 2261587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261653) 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, 161540 + ... + 161553.

It is an arithmetic number, because the mean of its divisors is an integer number (646188).

2^2261651 is an apocalyptic number.

2261651 is a deficient number, since it is larger than the sum of its proper divisors (323101).

2261651 is an equidigital number, since it uses as much as digits as its factorization.

2261651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323100.

The product of its digits is 720, while the sum is 23.

The square root of 2261651 is about 1503.8786520195. The cubic root of 2261651 is about 131.2628601156.

The spelling of 2261651 in words is "two million, two hundred sixty-one thousand, six hundred fifty-one".