146216251 has 4 divisors (see below), whose sum is σ = 146244600. Its totient is φ = 146187904.

The previous prime is 146216227. The next prime is 146216261. The reversal of 146216251 is 152612641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152612641 = 7069 ⋅21589.

It is a cyclic number.

It is not a de Polignac number, because 146216251 - 2¹⁵ = 146183483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146216261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4006 + ... + 17563.

It is an arithmetic number, because the mean of its divisors is an integer number (36561150).

Almost surely, 2^146216251 is an apocalyptic number.

146216251 is a deficient number, since it is larger than the sum of its proper divisors (28349).

146216251 is an equidigital number, since it uses as much as digits as its factorization.

146216251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28348.

The product of its digits is 2880, while the sum is 28.

The square root of 146216251 is about 12091.9911925208. The cubic root of 146216251 is about 526.8235915885.

Adding to 146216251 its reverse (152612641), we get a palindrome (298828892).

The spelling of 146216251 in words is "one hundred forty-six million, two hundred sixteen thousand, two hundred fifty-one".