2087531 has 2 divisors, whose sum is σ = 2087532. Its totient is φ = 2087530.

The previous prime is 2087497. The next prime is 2087539. The reversal of 2087531 is 1357802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2087531 - 2⁶ = 2087467 is a prime.

It is a super-2 number, since 2×2087531² = 8715571351922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2087531.

It is not a weakly prime, because it can be changed into another prime (2087539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043765 + 1043766.

It is an arithmetic number, because the mean of its divisors is an integer number (1043766).

2^2087531 is an apocalyptic number.

2087531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2087531 is an equidigital number, since it uses as much as digits as its factorization.

2087531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2087531 is about 1444.8290556325. The cubic root of 2087531 is about 127.8039601602.

The spelling of 2087531 in words is "two million, eighty-seven thousand, five hundred thirty-one".