82215403 has 2 divisors, whose sum is σ = 82215404. Its totient is φ = 82215402.

The previous prime is 82215347. The next prime is 82215431. The reversal of 82215403 is 30451228.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82215403 - 2¹³ = 82207211 is a prime.

It is not a weakly prime, because it can be changed into another prime (82215433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41107701 + 41107702.

It is an arithmetic number, because the mean of its divisors is an integer number (41107702).

Almost surely, 2^82215403 is an apocalyptic number.

82215403 is a deficient number, since it is larger than the sum of its proper divisors (1).

82215403 is an equidigital number, since it uses as much as digits as its factorization.

82215403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 82215403 is about 9067.2709786352. The cubic root of 82215403 is about 434.8282283003.

The spelling of 82215403 in words is "eighty-two million, two hundred fifteen thousand, four hundred three".