2151563 has 2 divisors, whose sum is σ = 2151564. Its totient is φ = 2151562.

The previous prime is 2151533. The next prime is 2151593. The reversal of 2151563 is 3651512.

It is a balanced prime because it is at equal distance from previous prime (2151533) and next prime (2151593).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151563 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2151533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075781 + 1075782.

It is an arithmetic number, because the mean of its divisors is an integer number (1075782).

2^2151563 is an apocalyptic number.

2151563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151563 is an equidigital number, since it uses as much as digits as its factorization.

2151563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 23.

The square root of 2151563 is about 1466.8207116073. The cubic root of 2151563 is about 129.0975565548.

The spelling of 2151563 in words is "two million, one hundred fifty-one thousand, five hundred sixty-three".