100643255 has 8 divisors (see below), whose sum is σ = 121380000. Its totient is φ = 80109216.

The previous prime is 100643251. The next prime is 100643261. The reversal of 100643255 is 552346001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100643255 - 2² = 100643251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100643251) 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, 49580 + ... + 51569.

It is an arithmetic number, because the mean of its divisors is an integer number (15172500).

Almost surely, 2^100643255 is an apocalyptic number.

100643255 is a deficient number, since it is larger than the sum of its proper divisors (20736745).

100643255 is a wasteful number, since it uses less digits than its factorization.

100643255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101353.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 100643255 is about 10032.1111935624. Note that the first 4 decimals coincide. The cubic root of 100643255 is about 465.1519987158.

Adding to 100643255 its reverse (552346001), we get a palindrome (652989256).

The spelling of 100643255 in words is "one hundred million, six hundred forty-three thousand, two hundred fifty-five".