100223720 has 32 divisors (see below), whose sum is σ = 227161800. Its totient is φ = 39794688.

The previous prime is 100223699. The next prime is 100223723. The reversal of 100223720 is 27322001.

It can be written as a sum of positive squares in 4 ways, for example, as 99480676 + 743044 = 9974^2 + 862^2 .

It is not an unprimeable number, because it can be changed into a prime (100223723) 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, 3665 + ... + 14624.

Almost surely, 2^100223720 is an apocalyptic number.

100223720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100223720 is an abundant number, since it is smaller than the sum of its proper divisors (126938080).

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

100223720 is a wasteful number, since it uses less digits than its factorization.

100223720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18437 (or 18433 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 100223720 is about 10011.1797506588. The cubic root of 100223720 is about 464.5047643057.

Adding to 100223720 its reverse (27322001), we get a palindrome (127545721).

The spelling of 100223720 in words is "one hundred million, two hundred twenty-three thousand, seven hundred twenty".