2157797011 has 2 divisors, whose sum is σ = 2157797012. Its totient is φ = 2157797010.

The previous prime is 2157796987. The next prime is 2157797017. The reversal of 2157797011 is 1107977512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2157797011 - 2¹⁹ = 2157272723 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157797017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078898505 + 1078898506.

It is an arithmetic number, because the mean of its divisors is an integer number (1078898506).

Almost surely, 2^2157797011 is an apocalyptic number.

2157797011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157797011 is an equidigital number, since it uses as much as digits as its factorization.

2157797011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30870, while the sum is 40.

The square root of 2157797011 is about 46452.0937203050. The cubic root of 2157797011 is about 1292.2212019460.

The spelling of 2157797011 in words is "two billion, one hundred fifty-seven million, seven hundred ninety-seven thousand, eleven".