151945217 has 2 divisors, whose sum is σ = 151945218. Its totient is φ = 151945216.

The previous prime is 151945169. The next prime is 151945249. The reversal of 151945217 is 712549151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148254976 + 3690241 = 12176^2 + 1921^2 .

It is a cyclic number.

It is not a de Polignac number, because 151945217 - 2²² = 147750913 is a prime.

It is not a weakly prime, because it can be changed into another prime (151945267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75972608 + 75972609.

It is an arithmetic number, because the mean of its divisors is an integer number (75972609).

It is a Proth number, since it is equal to 4637 ⋅ 2¹⁵ + 1 and 4637 < 2¹⁵.

Almost surely, 2^151945217 is an apocalyptic number.

It is an amenable number.

151945217 is a deficient number, since it is larger than the sum of its proper divisors (1).

151945217 is an equidigital number, since it uses as much as digits as its factorization.

151945217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 35.

The square root of 151945217 is about 12326.6060616862. The cubic root of 151945217 is about 533.6162066684.

The spelling of 151945217 in words is "one hundred fifty-one million, nine hundred forty-five thousand, two hundred seventeen".