721522050 has 24 divisors (see below), whose sum is σ = 1789375056. Its totient is φ = 192405840.

The previous prime is 721522037. The next prime is 721522097. The reversal of 721522050 is 50225127.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 721522050.

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 11 ways as a sum of consecutive naturals, for example, 2404924 + ... + 2405223.

It is an arithmetic number, because the mean of its divisors is an integer number (74557294).

Almost surely, 2^721522050 is an apocalyptic number.

721522050 is an abundant number, since it is smaller than the sum of its proper divisors (1067853006).

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

721522050 is a wasteful number, since it uses less digits than its factorization.

721522050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4810162 (or 4810157 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 721522050 is about 26861.1624841517. The cubic root of 721522050 is about 896.9120716586.

Adding to 721522050 its reverse (50225127), we get a palindrome (771747177).

The spelling of 721522050 in words is "seven hundred twenty-one million, five hundred twenty-two thousand, fifty".