2152157197 has 2 divisors, whose sum is σ = 2152157198. Its totient is φ = 2152157196.

The previous prime is 2152157191. The next prime is 2152157239. The reversal of 2152157197 is 7917512512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2066520681 + 85636516 = 45459^2 + 9254^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152157197 - 2¹⁹ = 2151632909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2152157191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076078598 + 1076078599.

It is an arithmetic number, because the mean of its divisors is an integer number (1076078599).

Almost surely, 2^2152157197 is an apocalyptic number.

It is an amenable number.

2152157197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2152157197 is an equidigital number, since it uses as much as digits as its factorization.

2152157197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 40.

The square root of 2152157197 is about 46391.3482990094. The cubic root of 2152157197 is about 1291.0943974856.

The spelling of 2152157197 in words is "two billion, one hundred fifty-two million, one hundred fifty-seven thousand, one hundred ninety-seven".