154225213 has 8 divisors (see below), whose sum is σ = 159275480. Its totient is φ = 149221440.

The previous prime is 154225187. The next prime is 154225237. The reversal of 154225213 is 312522451.

It can be written as a sum of positive squares in 4 ways, for example, as 38167684 + 116057529 = 6178^2 + 10773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154225213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154225243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4818 + ... + 18211.

It is an arithmetic number, because the mean of its divisors is an integer number (19909435).

Almost surely, 2^154225213 is an apocalyptic number.

It is an amenable number.

154225213 is a deficient number, since it is larger than the sum of its proper divisors (5050267).

154225213 is a wasteful number, since it uses less digits than its factorization.

154225213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23247.

The product of its digits is 2400, while the sum is 25.

The square root of 154225213 is about 12418.7444212368. The cubic root of 154225213 is about 536.2720051898.

Adding to 154225213 its reverse (312522451), we get a palindrome (466747664).

The spelling of 154225213 in words is "one hundred fifty-four million, two hundred twenty-five thousand, two hundred thirteen".