2197651903 has 2 divisors, whose sum is σ = 2197651904. Its totient is φ = 2197651902.

The previous prime is 2197651879. The next prime is 2197651919. The reversal of 2197651903 is 3091567912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2197651903 - 2²⁵ = 2164097471 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2197651903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197651993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098825951 + 1098825952.

It is an arithmetic number, because the mean of its divisors is an integer number (1098825952).

Almost surely, 2^2197651903 is an apocalyptic number.

2197651903 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197651903 is an equidigital number, since it uses as much as digits as its factorization.

2197651903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 2197651903 is about 46879.1201175961. The cubic root of 2197651903 is about 1300.1285677578.

The spelling of 2197651903 in words is "two billion, one hundred ninety-seven million, six hundred fifty-one thousand, nine hundred three".