51021043215 has 8 divisors (see below), whose sum is σ = 81633669168. Its totient is φ = 27211223040.

The previous prime is 51021043201. The next prime is 51021043247. The reversal of 51021043215 is 51234012015.

It is a happy number.

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

It is not a de Polignac number, because 51021043215 - 2²¹ = 51018946063 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1700701426 + ... + 1700701455.

It is an arithmetic number, because the mean of its divisors is an integer number (10204208646).

Almost surely, 2^51021043215 is an apocalyptic number.

51021043215 is a deficient number, since it is larger than the sum of its proper divisors (30612625953).

51021043215 is a wasteful number, since it uses less digits than its factorization.

51021043215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401402889.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 51021043215 in words is "fifty-one billion, twenty-one million, forty-three thousand, two hundred fifteen".