51570020215 has 16 divisors (see below), whose sum is σ = 70730821440. Its totient is φ = 35359188480.

The previous prime is 51570020213. The next prime is 51570020233. The reversal of 51570020215 is 51202007515.

It is not a de Polignac number, because 51570020215 - 2¹ = 51570020213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51570020213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382095 + ... + 499135.

It is an arithmetic number, because the mean of its divisors is an integer number (4420676340).

Almost surely, 2^51570020215 is an apocalyptic number.

51570020215 is a deficient number, since it is larger than the sum of its proper divisors (19160801225).

51570020215 is a wasteful number, since it uses less digits than its factorization.

51570020215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129642.

The product of its (nonzero) digits is 3500, while the sum is 28.

The spelling of 51570020215 in words is "fifty-one billion, five hundred seventy million, twenty thousand, two hundred fifteen".