2521831 has 8 divisors (see below), whose sum is σ = 2875824. Its totient is φ = 2190720.

The previous prime is 2521829. The next prime is 2521843. The reversal of 2521831 is 1381252.

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 2521831 - 2¹ = 2521829 is a prime.

It is a super-4 number, since 4×2521831⁴ (a number of 27 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5485 + ... + 5926.

It is an arithmetic number, because the mean of its divisors is an integer number (359478).

2^2521831 is an apocalyptic number.

2521831 is a deficient number, since it is larger than the sum of its proper divisors (353993).

2521831 is a wasteful number, since it uses less digits than its factorization.

2521831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11441.

The product of its digits is 480, while the sum is 22.

The square root of 2521831 is about 1588.0273927108. The cubic root of 2521831 is about 136.1147927861.

The spelling of 2521831 in words is "two million, five hundred twenty-one thousand, eight hundred thirty-one".