722121151 has 4 divisors (see below), whose sum is σ = 739733904. Its totient is φ = 704508400.

The previous prime is 722121143. The next prime is 722121167. The reversal of 722121151 is 151121227.

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 722121151 - 2³ = 722121143 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 (722121181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8806315 + ... + 8806396.

It is an arithmetic number, because the mean of its divisors is an integer number (184933476).

Almost surely, 2^722121151 is an apocalyptic number.

722121151 is a deficient number, since it is larger than the sum of its proper divisors (17612753).

722121151 is a wasteful number, since it uses less digits than its factorization.

722121151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17612752.

The product of its digits is 280, while the sum is 22.

The square root of 722121151 is about 26872.3119772006. The cubic root of 722121151 is about 897.1602471483.

Adding to 722121151 its reverse (151121227), we get a palindrome (873242378).

The spelling of 722121151 in words is "seven hundred twenty-two million, one hundred twenty-one thousand, one hundred fifty-one".