2215107491 has 2 divisors, whose sum is σ = 2215107492. Its totient is φ = 2215107490.

The previous prime is 2215107439. The next prime is 2215107523. The reversal of 2215107491 is 1947015122.

It is an a-pointer prime, because the next prime (2215107523) can be obtained adding 2215107491 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2215107491 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2215107431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1107553745 + 1107553746.

It is an arithmetic number, because the mean of its divisors is an integer number (1107553746).

Almost surely, 2^2215107491 is an apocalyptic number.

2215107491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2215107491 is an equidigital number, since it uses as much as digits as its factorization.

2215107491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 2215107491 is about 47064.9284605852. The cubic root of 2215107491 is about 1303.5617299266.

The spelling of 2215107491 in words is "two billion, two hundred fifteen million, one hundred seven thousand, four hundred ninety-one".