921122500 has 45 divisors (see below), whose sum is σ = 2017634619. Its totient is φ = 367842000.

The previous prime is 921122483. The next prime is 921122507. The reversal of 921122500 is 5221129.

The square root of 921122500 is 30350.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 72216004 + 848906496 = 8498^2 + 29136^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921122507) by changing a digit.

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 14 ways as a sum of consecutive naturals, for example, 1517197 + ... + 1517803.

Almost surely, 2^921122500 is an apocalyptic number.

921122500 is the 30350-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 921122500

921122500 is an abundant number, since it is smaller than the sum of its proper divisors (1096512119).

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

921122500 is an frugal number, since it uses more digits than its factorization.

921122500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238 (or 614 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The cubic root of 921122500 is about 972.9842201493.

Adding to 921122500 its reverse (5221129), we get a palindrome (926343629).

The spelling of 921122500 in words is "nine hundred twenty-one million, one hundred twenty-two thousand, five hundred".