612216151 has 4 divisors (see below), whose sum is σ = 613058992. Its totient is φ = 611373312.

The previous prime is 612216133. The next prime is 612216167. The reversal of 612216151 is 151612216.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 612216151 - 2¹¹ = 612214103 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 (612216181) 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, 420330 + ... + 421783.

It is an arithmetic number, because the mean of its divisors is an integer number (153264748).

Almost surely, 2^612216151 is an apocalyptic number.

612216151 is a deficient number, since it is larger than the sum of its proper divisors (842841).

612216151 is an equidigital number, since it uses as much as digits as its factorization.

612216151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842840.

The product of its digits is 720, while the sum is 25.

The square root of 612216151 is about 24743.0020611889. The cubic root of 612216151 is about 849.1184174654.

Adding to 612216151 its reverse (151612216), we get a palindrome (763828367).

The spelling of 612216151 in words is "six hundred twelve million, two hundred sixteen thousand, one hundred fifty-one".