2503997161 has 2 divisors, whose sum is σ = 2503997162. Its totient is φ = 2503997160.

The previous prime is 2503997147. The next prime is 2503997207. The reversal of 2503997161 is 1617993052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1418953561 + 1085043600 = 37669^2 + 32940^2 .

It is a cyclic number.

It is not a de Polignac number, because 2503997161 - 2⁵ = 2503997129 is a prime.

It is not a weakly prime, because it can be changed into another prime (2503997101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1251998580 + 1251998581.

It is an arithmetic number, because the mean of its divisors is an integer number (1251998581).

Almost surely, 2^2503997161 is an apocalyptic number.

It is an amenable number.

2503997161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2503997161 is an equidigital number, since it uses as much as digits as its factorization.

2503997161 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2503997161 is about 50039.9556454640. The cubic root of 2503997161 is about 1357.9317540858.

The spelling of 2503997161 in words is "two billion, five hundred three million, nine hundred ninety-seven thousand, one hundred sixty-one".