2531161 has 8 divisors (see below), whose sum is σ = 2692800. Its totient is φ = 2372400.

The previous prime is 2531117. The next prime is 2531167. The reversal of 2531161 is 1611352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2531161 - 2¹⁵ = 2498393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531167) 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, 1260 + ... + 2578.

It is an arithmetic number, because the mean of its divisors is an integer number (336600).

2^2531161 is an apocalyptic number.

2531161 is the 712-nd centered decagonal number.

It is an amenable number.

2531161 is a deficient number, since it is larger than the sum of its proper divisors (161639).

2531161 is a wasteful number, since it uses less digits than its factorization.

2531161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439.

The product of its digits is 180, while the sum is 19.

The square root of 2531161 is about 1590.9622874223. The cubic root of 2531161 is about 136.2824471723.

The spelling of 2531161 in words is "two million, five hundred thirty-one thousand, one hundred sixty-one".