151212213 has 12 divisors (see below), whose sum is σ = 218541388. Its totient is φ = 100751040.

The previous prime is 151212181. The next prime is 151212227. The reversal of 151212213 is 312212151.

It can be written as a sum of positive squares in 2 ways, for example, as 123143409 + 28068804 = 11097^2 + 5298^2 .

It is not a de Polignac number, because 151212213 - 2⁵ = 151212181 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151212253) 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 11 ways as a sum of consecutive naturals, for example, 17481 + ... + 24657.

Almost surely, 2^151212213 is an apocalyptic number.

It is an amenable number.

151212213 is a deficient number, since it is larger than the sum of its proper divisors (67329175).

151212213 is a wasteful number, since it uses less digits than its factorization.

151212213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524 (or 9521 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 151212213 is about 12296.8375202733. The cubic root of 151212213 is about 532.7567445371.

Adding to 151212213 its reverse (312212151), we get a palindrome (463424364).

The spelling of 151212213 in words is "one hundred fifty-one million, two hundred twelve thousand, two hundred thirteen".