154222513 has 8 divisors (see below), whose sum is σ = 156596328. Its totient is φ = 151866624.

The previous prime is 154222511. The next prime is 154222517. The reversal of 154222513 is 315222451.

It can be written as a sum of positive squares in 4 ways, for example, as 15147664 + 139074849 = 3892^2 + 11793^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 154222513 - 2¹ = 154222511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154222511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13395 + ... + 22087.

It is an arithmetic number, because the mean of its divisors is an integer number (19574541).

Almost surely, 2^154222513 is an apocalyptic number.

It is an amenable number.

154222513 is a deficient number, since it is larger than the sum of its proper divisors (2373815).

154222513 is a wasteful number, since it uses less digits than its factorization.

154222513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963.

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

The square root of 154222513 is about 12418.6357141193. The cubic root of 154222513 is about 536.2688756910.

Adding to 154222513 its reverse (315222451), we get a palindrome (469444964).

The spelling of 154222513 in words is "one hundred fifty-four million, two hundred twenty-two thousand, five hundred thirteen".