2731506 has 16 divisors (see below), whose sum is σ = 5504544. Its totient is φ = 903584.

The previous prime is 2731501. The next prime is 2731511. The reversal of 2731506 is 6051372.

It is an interprime number because it is at equal distance from previous prime (2731501) and next prime (2731511).

It is a super-2 number, since 2×2731506² = 14922250056072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2731501) 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 7 ways as a sum of consecutive naturals, for example, 840 + ... + 2483.

It is an arithmetic number, because the mean of its divisors is an integer number (344034).

2^2731506 is an apocalyptic number.

2731506 is an abundant number, since it is smaller than the sum of its proper divisors (2773038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2731506 is a wasteful number, since it uses less digits than its factorization.

2731506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 2731506 is about 1652.7268376837. The cubic root of 2731506 is about 139.7871936955.

Adding to 2731506 its reverse (6051372), we get a palindrome (8782878).

The spelling of 2731506 in words is "two million, seven hundred thirty-one thousand, five hundred six".