195465251 has 2 divisors, whose sum is σ = 195465252. Its totient is φ = 195465250.

The previous prime is 195465233. The next prime is 195465287. The reversal of 195465251 is 152564591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 195465251 - 2⁶ = 195465187 is a prime.

It is not a weakly prime, because it can be changed into another prime (195465211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97732625 + 97732626.

It is an arithmetic number, because the mean of its divisors is an integer number (97732626).

Almost surely, 2^195465251 is an apocalyptic number.

195465251 is a deficient number, since it is larger than the sum of its proper divisors (1).

195465251 is an equidigital number, since it uses as much as digits as its factorization.

195465251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 38.

The square root of 195465251 is about 13980.8887771844. Note that the first 3 decimals coincide. The cubic root of 195465251 is about 580.3498196856.

The spelling of 195465251 in words is "one hundred ninety-five million, four hundred sixty-five thousand, two hundred fifty-one".