2646331 has 4 divisors (see below), whose sum is σ = 2666664. Its totient is φ = 2626000.

The previous prime is 2646269. The next prime is 2646353. The reversal of 2646331 is 1336462.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2646331 is a prime.

It is a super-2 number, since 2×2646331² = 14006135523122, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 6 + 4¹⁰ + 6⁴ + 3⁴ + 3¹³ + 1 .

It is a Duffinian number.

2646331 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2646296 and 2646305.

It is not an unprimeable number, because it can be changed into a prime (2646361) 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, 9970 + ... + 10231.

It is an arithmetic number, because the mean of its divisors is an integer number (666666).

2^2646331 is an apocalyptic number.

2646331 is a deficient number, since it is larger than the sum of its proper divisors (20333).

2646331 is a wasteful number, since it uses less digits than its factorization.

2646331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20332.

The product of its digits is 2592, while the sum is 25.

The square root of 2646331 is about 1626.7547448832. The cubic root of 2646331 is about 138.3188559227.

It can be divided in two parts, 2646 and 331, that multiplied together give a triangular number (875826 = T₁₃₂₃).

The spelling of 2646331 in words is "two million, six hundred forty-six thousand, three hundred thirty-one".