103211031 has 32 divisors (see below), whose sum is σ = 172297728. Its totient is φ = 53389440.
The previous prime is 103211027. The next prime is 103211033. The reversal of 103211031 is 130112301.
It is not a de Polignac number, because 103211031 - 22 = 103211027 is a prime.
It is a super-2 number, since 2×1032110312 = 21305033840165922, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 103210998 and 103211016.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (103211033) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63181 + ... + 64793.
It is an arithmetic number, because the mean of its divisors is an integer number (5384304).
Almost surely, 2103211031 is an apocalyptic number.
103211031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.
103211031 is a deficient number, since it is larger than the sum of its proper divisors (69086697).
103211031 is a wasteful number, since it uses less digits than its factorization.
103211031 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1911.
The product of its (nonzero) digits is 18, while the sum is 12.
The square root of 103211031 is about 10159.2829963536. The cubic root of 103211031 is about 469.0747316445.
Adding to 103211031 its reverse (130112301), we get a palindrome (233323332).
The spelling of 103211031 in words is "one hundred three million, two hundred eleven thousand, thirty-one".
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