103100031 has 6 divisors (see below), whose sum is σ = 148922280. Its totient is φ = 68733348.

The previous prime is 103100029. The next prime is 103100047. The reversal of 103100031 is 130001301.

It is not a de Polignac number, because 103100031 - 2¹ = 103100029 is a prime.

It is a super-2 number, since 2×103100031² = 21259232784401922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11455559 = 103100031 / (1 + 0 + 3 + 1 + 0 + 0 + 0 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 103099986 and 103100022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103100071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5727771 + ... + 5727788.

It is an arithmetic number, because the mean of its divisors is an integer number (24820380).

Almost surely, 2^103100031 is an apocalyptic number.

103100031 is a deficient number, since it is larger than the sum of its proper divisors (45822249).

103100031 is a wasteful number, since it uses less digits than its factorization.

103100031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11455565 (or 11455562 counting only the distinct ones).

The product of its (nonzero) digits is 9, while the sum is 9.

The square root of 103100031 is about 10153.8185427946. The cubic root of 103100031 is about 468.9065132818.

Adding to 103100031 its reverse (130001301), we get a palindrome (233101332).

The spelling of 103100031 in words is "one hundred three million, one hundred thousand, thirty-one".