722157230 has 8 divisors (see below), whose sum is σ = 1299883032. Its totient is φ = 288862888.

The previous prime is 722157199. The next prime is 722157251. The reversal of 722157230 is 32751227.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×722157230² = 1043022129682545800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 722157193 and 722157202.

It is a congruent number.

It is an unprimeable number.

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, 36107852 + ... + 36107871.

It is an arithmetic number, because the mean of its divisors is an integer number (162485379).

Almost surely, 2^722157230 is an apocalyptic number.

722157230 is a deficient number, since it is larger than the sum of its proper divisors (577725802).

722157230 is a wasteful number, since it uses less digits than its factorization.

722157230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72215730.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 722157230 is about 26872.9832731686. The cubic root of 722157230 is about 897.1751883649.

The spelling of 722157230 in words is "seven hundred twenty-two million, one hundred fifty-seven thousand, two hundred thirty".