2561332 has 6 divisors (see below), whose sum is σ = 4482338. Its totient is φ = 1280664.

The previous prime is 2561327. The next prime is 2561341. The reversal of 2561332 is 2331652.

It can be written as a sum of positive squares in only one way, i.e., 1628176 + 933156 = 1276^2 + 966^2 .

It is a super-2 number, since 2×2561332² = 13120843228448, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2³ + 5⁵ + 6⁸ + 1 + 3¹¹ + 3¹¹ + 2¹⁹ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320163 + ... + 320170.

2^2561332 is an apocalyptic number.

It is an amenable number.

2561332 is a deficient number, since it is larger than the sum of its proper divisors (1921006).

2561332 is a wasteful number, since it uses less digits than its factorization.

2561332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640337 (or 640335 counting only the distinct ones).

The product of its digits is 1080, while the sum is 22.

The square root of 2561332 is about 1600.4161958691. The cubic root of 2561332 is about 136.8217975366.

Adding to 2561332 its reverse (2331652), we get a palindrome (4892984).

The spelling of 2561332 in words is "two million, five hundred sixty-one thousand, three hundred thirty-two".