3115531 has 4 divisors (see below), whose sum is σ = 3216064. Its totient is φ = 3015000.

The previous prime is 3115529. The next prime is 3115537. The reversal of 3115531 is 1355113.

3115531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3115531 - 2¹ = 3115529 is a prime.

It is a super-2 number, since 2×3115531² = 19413066823922, which contains 22 as substring.

3115531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3115499 and 3115508.

It is not an unprimeable number, because it can be changed into a prime (3115537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50220 + ... + 50281.

It is an arithmetic number, because the mean of its divisors is an integer number (804016).

Almost surely, 2^3115531 is an apocalyptic number.

3115531 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3115531 is a deficient number, since it is larger than the sum of its proper divisors (100533).

3115531 is a wasteful number, since it uses less digits than its factorization.

3115531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100532.

The product of its digits is 225, while the sum is 19.

The square root of 3115531 is about 1765.0866834238. The cubic root of 3115531 is about 146.0530707172.

The spelling of 3115531 in words is "three million, one hundred fifteen thousand, five hundred thirty-one".