102320031 has 32 divisors (see below), whose sum is σ = 156805632. Its totient is φ = 58741760.

The previous prime is 102320021. The next prime is 102320083. The reversal of 102320031 is 130023201.

It is a happy number.

It is not a de Polignac number, because 102320031 - 2¹⁴ = 102303647 is a prime.

It is a super-2 number, since 2×102320031² = 20938777487681922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102319989 and 102320016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102320011) 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, 85171 + ... + 86363.

It is an arithmetic number, because the mean of its divisors is an integer number (4900176).

Almost surely, 2^102320031 is an apocalyptic number.

102320031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

102320031 is a deficient number, since it is larger than the sum of its proper divisors (54485601).

102320031 is a wasteful number, since it uses less digits than its factorization.

102320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 102320031 is about 10115.3364254482. The cubic root of 102320031 is about 467.7210195355.

Adding to 102320031 its reverse (130023201), we get a palindrome (232343232).

The spelling of 102320031 in words is "one hundred two million, three hundred twenty thousand, thirty-one".