722151556 has 12 divisors (see below), whose sum is σ = 1444303168. Its totient is φ = 309493512.

The previous prime is 722151511. The next prime is 722151581. The reversal of 722151556 is 655151227.

722151556 is an admirable number.

It is a super-2 number, since 2×722151556² = 1043005739666442272, which contains 22 as substring.

It is an unprimeable number.

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, 12895536 + ... + 12895591.

Almost surely, 2^722151556 is an apocalyptic number.

It is an amenable number.

722151556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

722151556 is a wasteful number, since it uses less digits than its factorization.

722151556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25791138 (or 25791136 counting only the distinct ones).

The product of its digits is 21000, while the sum is 34.

The square root of 722151556 is about 26872.8777022484. The cubic root of 722151556 is about 897.1728386525.

The spelling of 722151556 in words is "seven hundred twenty-two million, one hundred fifty-one thousand, five hundred fifty-six".