722164081 has 4 divisors (see below), whose sum is σ = 724486464. Its totient is φ = 719841700.

The previous prime is 722164057. The next prime is 722164133. The reversal of 722164081 is 180461227.

722164081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 722164081 - 2⁵ = 722164049 is a prime.

It is a super-2 number, since 2×722164081² = 1043041919773149122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722167081) 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, 1160725 + ... + 1161346.

It is an arithmetic number, because the mean of its divisors is an integer number (181121616).

Almost surely, 2^722164081 is an apocalyptic number.

It is an amenable number.

722164081 is a deficient number, since it is larger than the sum of its proper divisors (2322383).

722164081 is a wasteful number, since it uses less digits than its factorization.

722164081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322382.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 722164081 is about 26873.1107428969. The cubic root of 722164081 is about 897.1780254792.

The spelling of 722164081 in words is "seven hundred twenty-two million, one hundred sixty-four thousand, eighty-one".