102431220555 has 16 divisors (see below), whose sum is σ = 173530538784. Its totient is φ = 51416455680.

The previous prime is 102431220533. The next prime is 102431220559. The reversal of 102431220555 is 555022134201.

It is not a de Polignac number, because 102431220555 - 2²³ = 102422831947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102431220559) by changing a digit.

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, 200845276 + ... + 200845785.

It is an arithmetic number, because the mean of its divisors is an integer number (10845658674).

Almost surely, 2^102431220555 is an apocalyptic number.

102431220555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

102431220555 is a deficient number, since it is larger than the sum of its proper divisors (71099318229).

102431220555 is a wasteful number, since it uses less digits than its factorization.

102431220555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401691086.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 102431220555 its reverse (555022134201), we get a palindrome (657453354756).

The spelling of 102431220555 in words is "one hundred two billion, four hundred thirty-one million, two hundred twenty thousand, five hundred fifty-five".