621053500 has 24 divisors (see below), whose sum is σ = 1356381936. Its totient is φ = 248421200.

The previous prime is 621053491. The next prime is 621053501. The reversal of 621053500 is 5350126.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621053501) 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 7 ways as a sum of consecutive naturals, for example, 620554 + ... + 621553.

It is an arithmetic number, because the mean of its divisors is an integer number (56515914).

Almost surely, 2^621053500 is an apocalyptic number.

It is an amenable number.

621053500 is an abundant number, since it is smaller than the sum of its proper divisors (735328436).

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

621053500 is a wasteful number, since it uses less digits than its factorization.

621053500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242126 (or 1242114 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 621053500 is about 24920.9450061590. The cubic root of 621053500 is about 853.1845935552.

The spelling of 621053500 in words is "six hundred twenty-one million, fifty-three thousand, five hundred".