197631151 has 2 divisors, whose sum is σ = 197631152. Its totient is φ = 197631150.

The previous prime is 197631059. The next prime is 197631199. The reversal of 197631151 is 151136791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197631151 - 2¹⁵ = 197598383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197631751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98815575 + 98815576.

It is an arithmetic number, because the mean of its divisors is an integer number (98815576).

Almost surely, 2^197631151 is an apocalyptic number.

197631151 is a deficient number, since it is larger than the sum of its proper divisors (1).

197631151 is an equidigital number, since it uses as much as digits as its factorization.

197631151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 34.

The square root of 197631151 is about 14058.1346913451. The cubic root of 197631151 is about 582.4855194814.

The spelling of 197631151 in words is "one hundred ninety-seven million, six hundred thirty-one thousand, one hundred fifty-one".