2231611851 has 40 divisors (see below), whose sum is σ = 3484892160. Its totient is φ = 1270181136.

The previous prime is 2231611847. The next prime is 2231611873. The reversal of 2231611851 is 1581161322.

It is not a de Polignac number, because 2231611851 - 2² = 2231611847 is a prime.

It is a super-3 number, since 3×2231611851³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231611831) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2585446 + ... + 2586308.

It is an arithmetic number, because the mean of its divisors is an integer number (87122304).

Almost surely, 2^2231611851 is an apocalyptic number.

2231611851 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2231611851 is a deficient number, since it is larger than the sum of its proper divisors (1253280309).

2231611851 is an frugal number, since it uses more digits than its factorization.

2231611851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1232 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 2231611851 is about 47239.9391511039. The cubic root of 2231611851 is about 1306.7912554814.

The spelling of 2231611851 in words is "two billion, two hundred thirty-one million, six hundred eleven thousand, eight hundred fifty-one".