100624221 has 8 divisors (see below), whose sum is σ = 149072960. Its totient is φ = 67082796.

The previous prime is 100624193. The next prime is 100624243. The reversal of 100624221 is 122426001.

It is not a de Polignac number, because 100624221 - 2⁵ = 100624189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100624194 and 100624203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100624261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863385 + ... + 1863438.

It is an arithmetic number, because the mean of its divisors is an integer number (18634120).

Almost surely, 2^100624221 is an apocalyptic number.

It is an amenable number.

100624221 is a deficient number, since it is larger than the sum of its proper divisors (48448739).

100624221 is an equidigital number, since it uses as much as digits as its factorization.

100624221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726832 (or 3726826 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 100624221 is about 10031.1624949454. The cubic root of 100624221 is about 465.1226731494.

The spelling of 100624221 in words is "one hundred million, six hundred twenty-four thousand, two hundred twenty-one".