2506351261 has 4 divisors (see below), whose sum is σ = 2508378652. Its totient is φ = 2504323872.

The previous prime is 2506351247. The next prime is 2506351283. The reversal of 2506351261 is 1621536052.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2161692036 + 344659225 = 46494^2 + 18565^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506351261 - 2²³ = 2497962653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506351231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1011840 + ... + 1014313.

It is an arithmetic number, because the mean of its divisors is an integer number (627094663).

Almost surely, 2^2506351261 is an apocalyptic number.

It is an amenable number.

2506351261 is a deficient number, since it is larger than the sum of its proper divisors (2027391).

2506351261 is a wasteful number, since it uses less digits than its factorization.

2506351261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2027390.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2506351261 is about 50063.4723226426. The cubic root of 2506351261 is about 1358.3571680245.

The spelling of 2506351261 in words is "two billion, five hundred six million, three hundred fifty-one thousand, two hundred sixty-one".