51221250466 has 8 divisors (see below), whose sum is σ = 76850099280. Its totient is φ = 25604550708.

The previous prime is 51221250463. The next prime is 51221250481. The reversal of 51221250466 is 66405212215.

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 (51221250463) 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, 3026716 + ... + 3043591.

It is an arithmetic number, because the mean of its divisors is an integer number (9606262410).

Almost surely, 2^51221250466 is an apocalyptic number.

51221250466 is a deficient number, since it is larger than the sum of its proper divisors (25628848814).

51221250466 is a wasteful number, since it uses less digits than its factorization.

51221250466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6074528.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 51221250466 in words is "fifty-one billion, two hundred twenty-one million, two hundred fifty thousand, four hundred sixty-six".