621225100 has 36 divisors (see below), whose sum is σ = 1351265944. Its totient is φ = 247898880.

The previous prime is 621225097. The next prime is 621225107. The reversal of 621225100 is 1522126.

It is not an unprimeable number, because it can be changed into a prime (621225107) by changing a digit.

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, 36127 + ... + 50473.

Almost surely, 2^621225100 is an apocalyptic number.

It is an amenable number.

621225100 is an abundant number, since it is smaller than the sum of its proper divisors (730040844).

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

621225100 is a wasteful number, since it uses less digits than its factorization.

621225100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14794 (or 14787 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 621225100 is about 24924.3876554671. The cubic root of 621225100 is about 853.2631659563.

Adding to 621225100 its reverse (1522126), we get a palindrome (622747226).

The spelling of 621225100 in words is "six hundred twenty-one million, two hundred twenty-five thousand, one hundred".