151206217 has 4 divisors (see below), whose sum is σ = 152593540. Its totient is φ = 149818896.

The previous prime is 151206197. The next prime is 151206227. The reversal of 151206217 is 712602151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53275401 + 97930816 = 7299^2 + 9896^2 .

It is a cyclic number.

It is not a de Polignac number, because 151206217 - 2¹¹ = 151204169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 151206191 and 151206200.

It is not an unprimeable number, because it can be changed into a prime (151206227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693498 + ... + 693715.

It is an arithmetic number, because the mean of its divisors is an integer number (38148385).

Almost surely, 2^151206217 is an apocalyptic number.

It is an amenable number.

151206217 is a deficient number, since it is larger than the sum of its proper divisors (1387323).

151206217 is a wasteful number, since it uses less digits than its factorization.

151206217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387322.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 151206217 is about 12296.5937153343. The cubic root of 151206217 is about 532.7497026640.

Adding to 151206217 its reverse (712602151), we get a palindrome (863808368).

The spelling of 151206217 in words is "one hundred fifty-one million, two hundred six thousand, two hundred seventeen".