100431215155 has 16 divisors (see below), whose sum is σ = 124210880640. Its totient is φ = 77914058112.

The previous prime is 100431215119. The next prime is 100431215173. The reversal of 100431215155 is 551512134001.

It is a cyclic number.

It is not a de Polignac number, because 100431215155 - 2¹³ = 100431206963 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1934784 + ... + 1986013.

It is an arithmetic number, because the mean of its divisors is an integer number (7763180040).

Almost surely, 2^100431215155 is an apocalyptic number.

100431215155 is a deficient number, since it is larger than the sum of its proper divisors (23779665485).

100431215155 is a wasteful number, since it uses less digits than its factorization.

100431215155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920958.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 100431215155 its reverse (551512134001), we get a palindrome (651943349156).

The spelling of 100431215155 in words is "one hundred billion, four hundred thirty-one million, two hundred fifteen thousand, one hundred fifty-five".