2051221310 has 16 divisors (see below), whose sum is σ = 3728046816. Its totient is φ = 812522208.

The previous prime is 2051221307. The next prime is 2051221331. The reversal of 2051221310 is 131221502.

It is a happy number.

It is a super-2 number, since 2×2051221310² = 8415017725196232200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 994709 + ... + 996768.

It is an arithmetic number, because the mean of its divisors is an integer number (233002926).

Almost surely, 2^2051221310 is an apocalyptic number.

2051221310 is a deficient number, since it is larger than the sum of its proper divisors (1676825506).

2051221310 is a wasteful number, since it uses less digits than its factorization.

2051221310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991587.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2051221310 is about 45290.4107952224. The cubic root of 2051221310 is about 1270.5863145173.

Adding to 2051221310 its reverse (131221502), we get a palindrome (2182442812).

The spelling of 2051221310 in words is "two billion, fifty-one million, two hundred twenty-one thousand, three hundred ten".