2649531 has 32 divisors (see below), whose sum is σ = 4055040. Its totient is φ = 1530144.

The previous prime is 2649529. The next prime is 2649541. The reversal of 2649531 is 1359462.

It is not a de Polignac number, because 2649531 - 2¹ = 2649529 is a prime.

It is a super-2 number, since 2×2649531² = 14040029039922, which contains 22 as substring.

Its product of digits (6480) is a multiple of the sum of its prime divisors (135).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56350 + ... + 56396.

It is an arithmetic number, because the mean of its divisors is an integer number (126720).

2^2649531 is an apocalyptic number.

2649531 is a deficient number, since it is larger than the sum of its proper divisors (1405509).

2649531 is a wasteful number, since it uses less digits than its factorization.

2649531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135.

The product of its digits is 6480, while the sum is 30.

The square root of 2649531 is about 1627.7380010309. The cubic root of 2649531 is about 138.3745861709.

The spelling of 2649531 in words is "two million, six hundred forty-nine thousand, five hundred thirty-one".