2158571497 has 2 divisors, whose sum is σ = 2158571498. Its totient is φ = 2158571496.

The previous prime is 2158571483. The next prime is 2158571537. The reversal of 2158571497 is 7941758512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2157695401 + 876096 = 46451^2 + 936^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158571497 - 2⁷ = 2158571369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2158571497.

It is not a weakly prime, because it can be changed into another prime (2158571197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079285748 + 1079285749.

It is an arithmetic number, because the mean of its divisors is an integer number (1079285749).

Almost surely, 2^2158571497 is an apocalyptic number.

It is an amenable number.

2158571497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158571497 is an equidigital number, since it uses as much as digits as its factorization.

2158571497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 49.

The square root of 2158571497 is about 46460.4293673659. The cubic root of 2158571497 is about 1292.3757866930.

The spelling of 2158571497 in words is "two billion, one hundred fifty-eight million, five hundred seventy-one thousand, four hundred ninety-seven".