2051155331 has 8 divisors (see below), whose sum is σ = 2117842944. Its totient is φ = 1984500360.

The previous prime is 2051155319. The next prime is 2051155333. The reversal of 2051155331 is 1335511502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2051155331 is a prime.

It is a super-2 number, since 2×2051155331² = 8414476383779439122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2051155331.

It is not an unprimeable number, because it can be changed into a prime (2051155333) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 235256 + ... + 243818.

It is an arithmetic number, because the mean of its divisors is an integer number (264730368).

Almost surely, 2^2051155331 is an apocalyptic number.

2051155331 is a deficient number, since it is larger than the sum of its proper divisors (66687613).

2051155331 is an equidigital number, since it uses as much as digits as its factorization.

2051155331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16321.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 2051155331 is about 45289.6823901427. The cubic root of 2051155331 is about 1270.5726912655.

Adding to 2051155331 its reverse (1335511502), we get a palindrome (3386666833).

The spelling of 2051155331 in words is "two billion, fifty-one million, one hundred fifty-five thousand, three hundred thirty-one".