11389531 has 16 divisors (see below), whose sum is σ = 12729600. Its totient is φ = 10140768.

The previous prime is 11389529. The next prime is 11389549. The reversal of 11389531 is 13598311.

It is a cyclic number.

It is not a de Polignac number, because 11389531 - 2¹ = 11389529 is a prime.

It is a super-2 number, since 2×11389531² = 259442832799922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11389493 and 11389502.

It is not an unprimeable number, because it can be changed into a prime (11389501) 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, 29085 + ... + 29473.

It is an arithmetic number, because the mean of its divisors is an integer number (795600).

Almost surely, 2^11389531 is an apocalyptic number.

11389531 is a deficient number, since it is larger than the sum of its proper divisors (1340069).

11389531 is a wasteful number, since it uses less digits than its factorization.

11389531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498.

The product of its digits is 3240, while the sum is 31.

The square root of 11389531 is about 3374.8379220342. The cubic root of 11389531 is about 224.9927964772.

The spelling of 11389531 in words is "eleven million, three hundred eighty-nine thousand, five hundred thirty-one".