151204661 has 2 divisors, whose sum is σ = 151204662. Its totient is φ = 151204660.

The previous prime is 151204643. The next prime is 151204663. The reversal of 151204661 is 166402151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151167025 + 37636 = 12295^2 + 194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151204661 is a prime.

It is a Sophie Germain prime.

Together with 151204663, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 151204661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151204663) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75602330 + 75602331.

It is an arithmetic number, because the mean of its divisors is an integer number (75602331).

Almost surely, 2^151204661 is an apocalyptic number.

It is an amenable number.

151204661 is a deficient number, since it is larger than the sum of its proper divisors (1).

151204661 is an equidigital number, since it uses as much as digits as its factorization.

151204661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 151204661 is about 12296.5304456176. The cubic root of 151204661 is about 532.7478752228.

The spelling of 151204661 in words is "one hundred fifty-one million, two hundred four thousand, six hundred sixty-one".