2551238266 has 8 divisors (see below), whose sum is σ = 3848978484. Its totient is φ = 1268245440.

The previous prime is 2551238251. The next prime is 2551238267. The reversal of 2551238266 is 6628321552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1907855041 + 643383225 = 43679^2 + 25365^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2551238267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3686415 + ... + 3687106.

Almost surely, 2^2551238266 is an apocalyptic number.

2551238266 is a deficient number, since it is larger than the sum of its proper divisors (1297740218).

2551238266 is a wasteful number, since it uses less digits than its factorization.

2551238266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7373696.

The product of its digits is 172800, while the sum is 40.

The square root of 2551238266 is about 50509.7838641188. The cubic root of 2551238266 is about 1366.4183115501.

The spelling of 2551238266 in words is "two billion, five hundred fifty-one million, two hundred thirty-eight thousand, two hundred sixty-six".