1571171051 has 2 divisors, whose sum is σ = 1571171052. Its totient is φ = 1571171050.

The previous prime is 1571171033. The next prime is 1571171053. The reversal of 1571171051 is 1501711751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1571171051 - 2¹⁸ = 1570908907 is a prime.

Together with 1571171053, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1571171053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 785585525 + 785585526.

It is an arithmetic number, because the mean of its divisors is an integer number (785585526).

Almost surely, 2^1571171051 is an apocalyptic number.

1571171051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1571171051 is an equidigital number, since it uses as much as digits as its factorization.

1571171051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1225, while the sum is 29.

The square root of 1571171051 is about 39638.0000882991. Note that the first 4 decimals coincide. The cubic root of 1571171051 is about 1162.5397807484.

The spelling of 1571171051 in words is "one billion, five hundred seventy-one million, one hundred seventy-one thousand, fifty-one".