2231520819 has 32 divisors (see below), whose sum is σ = 3361526784. Its totient is φ = 1305000480.

The previous prime is 2231520803. The next prime is 2231520839. The reversal of 2231520819 is 9180251322.

It is a happy number.

It is not a de Polignac number, because 2231520819 - 2⁴ = 2231520803 is a prime.

It is a super-3 number, since 3×2231520819³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 2231520819.

It is not an unprimeable number, because it can be changed into a prime (2231520839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108304 + ... + 127250.

It is an arithmetic number, because the mean of its divisors is an integer number (105047712).

Almost surely, 2^2231520819 is an apocalyptic number.

2231520819 is a deficient number, since it is larger than the sum of its proper divisors (1130005965).

2231520819 is a wasteful number, since it uses less digits than its factorization.

2231520819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19087.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 2231520819 is about 47238.9756345330. The cubic root of 2231520819 is about 1306.7734863460.

It can be divided in two parts, 22315 and 20819, that added together give a palindrome (43134).

The spelling of 2231520819 in words is "two billion, two hundred thirty-one million, five hundred twenty thousand, eight hundred nineteen".