2531660 has 12 divisors (see below), whose sum is σ = 5316528. Its totient is φ = 1012656.

The previous prime is 2531653. The next prime is 2531663. The reversal of 2531660 is 661352.

It is not an unprimeable number, because it can be changed into a prime (2531663) 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, 63272 + ... + 63311.

It is an arithmetic number, because the mean of its divisors is an integer number (443044).

2^2531660 is an apocalyptic number.

2531660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531660 is an abundant number, since it is smaller than the sum of its proper divisors (2784868).

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

2531660 is a wasteful number, since it uses less digits than its factorization.

2531660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126592 (or 126590 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 2531660 is about 1591.1191030215. The cubic root of 2531660 is about 136.2914022819.

The spelling of 2531660 in words is "two million, five hundred thirty-one thousand, six hundred sixty".