100721552 has 10 divisors (see below), whose sum is σ = 195148038. Its totient is φ = 50360768.

The previous prime is 100721539. The next prime is 100721557. The reversal of 100721552 is 255127001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 256 = 10036^2 + 16^2 .

It is not an unprimeable number, because it can be changed into a prime (100721557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3147533 + ... + 3147564.

Almost surely, 2^100721552 is an apocalyptic number.

It is an amenable number.

100721552 is a deficient number, since it is larger than the sum of its proper divisors (94426486).

100721552 is an equidigital number, since it uses as much as digits as its factorization.

100721552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6295105 (or 6295099 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 100721552 is about 10036.0127540772. The cubic root of 100721552 is about 465.2725915484.

Adding to 100721552 its reverse (255127001), we get a palindrome (355848553).

The spelling of 100721552 in words is "one hundred million, seven hundred twenty-one thousand, five hundred fifty-two".