2051326261 has 8 divisors (see below), whose sum is σ = 2073792600. Its totient is φ = 2028902400.

The previous prime is 2051326259. The next prime is 2051326283. The reversal of 2051326261 is 1626231502.

It can be written as a sum of positive squares in 4 ways, for example, as 1089396036 + 961930225 = 33006^2 + 31015^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2051326261 - 2¹ = 2051326259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051326661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91845 + ... + 111973.

It is an arithmetic number, because the mean of its divisors is an integer number (259224075).

Almost surely, 2^2051326261 is an apocalyptic number.

It is an amenable number.

2051326261 is a deficient number, since it is larger than the sum of its proper divisors (22466339).

2051326261 is a wasteful number, since it uses less digits than its factorization.

2051326261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21239.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 2051326261 is about 45291.5694252253. The cubic root of 2051326261 is about 1270.6079840514.

Adding to 2051326261 its reverse (1626231502), we get a palindrome (3677557763).

The spelling of 2051326261 in words is "two billion, fifty-one million, three hundred twenty-six thousand, two hundred sixty-one".