51026222266 has 4 divisors (see below), whose sum is σ = 76539333402. Its totient is φ = 25513111132.

The previous prime is 51026222263. The next prime is 51026222281. The reversal of 51026222266 is 66222262015.

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

It can be written as a sum of positive squares in only one way, i.e., 40937024241 + 10089198025 = 202329^2 + 100445^2 .

It is not an unprimeable number, because it can be changed into a prime (51026222263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12756555565 + ... + 12756555568.

Almost surely, 2^51026222266 is an apocalyptic number.

51026222266 is a deficient number, since it is larger than the sum of its proper divisors (25513111136).

51026222266 is a wasteful number, since it uses less digits than its factorization.

51026222266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25513111135.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 51026222266 in words is "fifty-one billion, twenty-six million, two hundred twenty-two thousand, two hundred sixty-six".