721010010 has 128 divisors (see below), whose sum is σ = 2068416000. Its totient is φ = 160688640.

The previous prime is 721009973. The next prime is 721010047. The reversal of 721010010 is 10010127.

It is an interprime number because it is at equal distance from previous prime (721009973) and next prime (721010047).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 421036 + ... + 422744.

It is an arithmetic number, because the mean of its divisors is an integer number (16159500).

Almost surely, 2^721010010 is an apocalyptic number.

721010010 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 721010010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034208000).

721010010 is an abundant number, since it is smaller than the sum of its proper divisors (1347405990).

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

721010010 is a wasteful number, since it uses less digits than its factorization.

721010010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1767 counting only the distinct ones).

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 721010010 is about 26851.6295594886. The cubic root of 721010010 is about 896.6998519770.

Adding to 721010010 its reverse (10010127), we get a palindrome (731020137).

The spelling of 721010010 in words is "seven hundred twenty-one million, ten thousand, ten".