722215081 has 4 divisors (see below), whose sum is σ = 825388672. Its totient is φ = 619041492.

The previous prime is 722215073. The next prime is 722215127. The reversal of 722215081 is 180512227.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 722215081 - 2³ = 722215073 is a prime.

It is a super-2 number, since 2×722215081² = 1043189246447673122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722215001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51586785 + ... + 51586798.

It is an arithmetic number, because the mean of its divisors is an integer number (206347168).

Almost surely, 2^722215081 is an apocalyptic number.

It is an amenable number.

722215081 is a deficient number, since it is larger than the sum of its proper divisors (103173591).

722215081 is a wasteful number, since it uses less digits than its factorization.

722215081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103173590.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 722215081 is about 26874.0596300596. The cubic root of 722215081 is about 897.1991448727.

The spelling of 722215081 in words is "seven hundred twenty-two million, two hundred fifteen thousand, eighty-one".