100520031 has 16 divisors (see below), whose sum is σ = 142146144. Its totient is φ = 62966784.

The previous prime is 100519999. The next prime is 100520039. The reversal of 100520031 is 130025001.

It is not a de Polignac number, because 100520031 - 2⁵ = 100519999 is a prime.

It is a super-2 number, since 2×100520031² = 20208553264481922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100519989 and 100520016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100520039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39411 + ... + 41883.

It is an arithmetic number, because the mean of its divisors is an integer number (8884134).

Almost surely, 2^100520031 is an apocalyptic number.

100520031 is a deficient number, since it is larger than the sum of its proper divisors (41626113).

100520031 is a wasteful number, since it uses less digits than its factorization.

100520031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3290.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 100520031 is about 10025.9678335810. The cubic root of 100520031 is about 464.9620826985.

Adding to 100520031 its reverse (130025001), we get a palindrome (230545032).

The spelling of 100520031 in words is "one hundred million, five hundred twenty thousand, thirty-one".