151812197 has 2 divisors, whose sum is σ = 151812198. Its totient is φ = 151812196.

The previous prime is 151812181. The next prime is 151812253. The reversal of 151812197 is 791218151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148986436 + 2825761 = 12206^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 151812197 - 2⁴ = 151812181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151812107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75906098 + 75906099.

It is an arithmetic number, because the mean of its divisors is an integer number (75906099).

Almost surely, 2^151812197 is an apocalyptic number.

It is an amenable number.

151812197 is a deficient number, since it is larger than the sum of its proper divisors (1).

151812197 is an equidigital number, since it uses as much as digits as its factorization.

151812197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 35.

The square root of 151812197 is about 12321.2092344867. The cubic root of 151812197 is about 533.4604436181.

The spelling of 151812197 in words is "one hundred fifty-one million, eight hundred twelve thousand, one hundred ninety-seven".