2329561 has 16 divisors (see below), whose sum is σ = 2709504. Its totient is φ = 1983744.

The previous prime is 2329559. The next prime is 2329567. The reversal of 2329561 is 1659232.

2329561 is a nontrivial binomial coefficient, being equal to C(2159, 2).

It is a cyclic number.

It is not a de Polignac number, because 2329561 - 2¹ = 2329559 is a prime.

It is a Duffinian number.

2329561 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2329567) 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, 18280 + ... + 18406.

It is an arithmetic number, because the mean of its divisors is an integer number (169344).

2^2329561 is an apocalyptic number.

2329561 is the 2158-th triangular number.

2329561 is the 720-th centered nonagonal number.

It is an amenable number.

2329561 is a deficient number, since it is larger than the sum of its proper divisors (379943).

2329561 is a wasteful number, since it uses less digits than its factorization.

2329561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its digits is 3240, while the sum is 28.

The square root of 2329561 is about 1526.2899462422. The cubic root of 2329561 is about 132.5637239463.

It can be divided in two parts, 23 and 29561, that added together give a square (29584 = 172²).

The spelling of 2329561 in words is "two million, three hundred twenty-nine thousand, five hundred sixty-one".