51222068 has 6 divisors (see below), whose sum is σ = 89638626. Its totient is φ = 25611032.

The previous prime is 51222047. The next prime is 51222107. The reversal of 51222068 is 86022215.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 128164 = 7148^2 + 358^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402755 + ... + 6402762.

It is an arithmetic number, because the mean of its divisors is an integer number (14939771).

Almost surely, 2^51222068 is an apocalyptic number.

It is an amenable number.

51222068 is a deficient number, since it is larger than the sum of its proper divisors (38416558).

51222068 is a wasteful number, since it uses less digits than its factorization.

51222068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12805521 (or 12805519 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 51222068 is about 7156.9594102524. The cubic root of 51222068 is about 371.3804482877.

The spelling of 51222068 in words is "fifty-one million, two hundred twenty-two thousand, sixty-eight".