2563531 has 4 divisors (see below), whose sum is σ = 2623192. Its totient is φ = 2503872.

The previous prime is 2563523. The next prime is 2563543. The reversal of 2563531 is 1353652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2563531 - 2³ = 2563523 is a prime.

It is a super-2 number, since 2×2563531² = 13143382375922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2563496 and 2563505.

It is not an unprimeable number, because it can be changed into a prime (2563331) 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 3 ways as a sum of consecutive naturals, for example, 29766 + ... + 29851.

It is an arithmetic number, because the mean of its divisors is an integer number (655798).

2^2563531 is an apocalyptic number.

2563531 is a deficient number, since it is larger than the sum of its proper divisors (59661).

2563531 is an equidigital number, since it uses as much as digits as its factorization.

2563531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59660.

The product of its digits is 2700, while the sum is 25.

The square root of 2563531 is about 1601.1030572702. The cubic root of 2563531 is about 136.8609418921.

The spelling of 2563531 in words is "two million, five hundred sixty-three thousand, five hundred thirty-one".