2187562841 has 2 divisors, whose sum is σ = 2187562842. Its totient is φ = 2187562840.

The previous prime is 2187562837. The next prime is 2187562847. The reversal of 2187562841 is 1482657812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2182291225 + 5271616 = 46715^2 + 2296^2 .

It is a cyclic number.

It is not a de Polignac number, because 2187562841 - 2² = 2187562837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2187562792 and 2187562801.

It is not a weakly prime, because it can be changed into another prime (2187562847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093781420 + 1093781421.

It is an arithmetic number, because the mean of its divisors is an integer number (1093781421).

Almost surely, 2^2187562841 is an apocalyptic number.

It is an amenable number.

2187562841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187562841 is an equidigital number, since it uses as much as digits as its factorization.

2187562841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 44.

The square root of 2187562841 is about 46771.3891283977. The cubic root of 2187562841 is about 1298.1359558779.

The spelling of 2187562841 in words is "two billion, one hundred eighty-seven million, five hundred sixty-two thousand, eight hundred forty-one".