102031311 has 32 divisors (see below), whose sum is σ = 148838400. Its totient is φ = 61948800.

The previous prime is 102031301. The next prime is 102031333. The reversal of 102031311 is 113130201.

It is not a de Polignac number, because 102031311 - 2⁷ = 102031183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102031301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212770 + ... + 213248.

It is an arithmetic number, because the mean of its divisors is an integer number (4651200).

Almost surely, 2^102031311 is an apocalyptic number.

102031311 is a deficient number, since it is larger than the sum of its proper divisors (46807089).

102031311 is a wasteful number, since it uses less digits than its factorization.

102031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 102031311 is about 10101.0549449055. The cubic root of 102031311 is about 467.2806768610.

Adding to 102031311 its reverse (113130201), we get a palindrome (215161512).

The spelling of 102031311 in words is "one hundred two million, thirty-one thousand, three hundred eleven".