2231520236 has 18 divisors (see below), whose sum is σ = 4292449980. Its totient is φ = 1014327160.

The previous prime is 2231520197. The next prime is 2231520241. The reversal of 2231520236 is 6320251322.

It is a super-3 number, since 3×2231520236³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2304806 + ... + 2305773.

Almost surely, 2^2231520236 is an apocalyptic number.

It is an amenable number.

2231520236 is a deficient number, since it is larger than the sum of its proper divisors (2060929744).

2231520236 is a wasteful number, since it uses less digits than its factorization.

2231520236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4610605 (or 4610592 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2231520236 is about 47238.9694637806. The cubic root of 2231520236 is about 1306.7733725448.

Adding to 2231520236 its reverse (6320251322), we get a palindrome (8551771558).

The spelling of 2231520236 in words is "two billion, two hundred thirty-one million, five hundred twenty thousand, two hundred thirty-six".