11231520 has 48 divisors (see below), whose sum is σ = 35380800. Its totient is φ = 2994944.

The previous prime is 11231513. The next prime is 11231537. The reversal of 11231520 is 2513211.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×11231520² = 252294083020800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11231520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11220 + ... + 12179.

It is an arithmetic number, because the mean of its divisors is an integer number (737100).

Almost surely, 2^11231520 is an apocalyptic number.

11231520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11231520 is an abundant number, since it is smaller than the sum of its proper divisors (24149280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11231520 is a wasteful number, since it uses less digits than its factorization.

11231520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23417 (or 23409 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 11231520 is about 3351.3459982520. The cubic root of 11231520 is about 223.9474791831.

Adding to 11231520 its reverse (2513211), we get a palindrome (13744731).

The spelling of 11231520 in words is "eleven million, two hundred thirty-one thousand, five hundred twenty".