197975846531 has 2 divisors, whose sum is σ = 197975846532. Its totient is φ = 197975846530.

The previous prime is 197975846489. The next prime is 197975846567. The reversal of 197975846531 is 135648579791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197975846531 is a prime.

It is a super-2 number, since 2×197975846531² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (197975846231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98987923265 + 98987923266.

It is an arithmetic number, because the mean of its divisors is an integer number (98987923266).

Almost surely, 2^197975846531 is an apocalyptic number.

197975846531 is a deficient number, since it is larger than the sum of its proper divisors (1).

197975846531 is an equidigital number, since it uses as much as digits as its factorization.

197975846531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57153600, while the sum is 65.

The spelling of 197975846531 in words is "one hundred ninety-seven billion, nine hundred seventy-five million, eight hundred forty-six thousand, five hundred thirty-one".