151432181 has 2 divisors, whose sum is σ = 151432182. Its totient is φ = 151432180.

The previous prime is 151432139. The next prime is 151432187. The reversal of 151432181 is 181234151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143400625 + 8031556 = 11975^2 + 2834^2 .

It is a cyclic number.

It is not a de Polignac number, because 151432181 - 2¹⁰ = 151431157 is a prime.

It is a super-2 number, since 2×151432181² = 45863410884833522, which contains 22 as substring.

It is a Sophie Germain 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 151432181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151432187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75716090 + 75716091.

It is an arithmetic number, because the mean of its divisors is an integer number (75716091).

Almost surely, 2^151432181 is an apocalyptic number.

It is an amenable number.

151432181 is a deficient number, since it is larger than the sum of its proper divisors (1).

151432181 is an equidigital number, since it uses as much as digits as its factorization.

151432181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 151432181 is about 12305.7783581535. The cubic root of 151432181 is about 533.0149526410.

The spelling of 151432181 in words is "one hundred fifty-one million, four hundred thirty-two thousand, one hundred eighty-one".