51312703251 has 8 divisors (see below), whose sum is σ = 68435438544. Its totient is φ = 34199218400.

The previous prime is 51312703249. The next prime is 51312703261. The reversal of 51312703251 is 15230721315.

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

It is a cyclic number.

It is not a de Polignac number, because 51312703251 - 2¹ = 51312703249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51312703201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2299656 + ... + 2321861.

It is an arithmetic number, because the mean of its divisors is an integer number (8554429818).

Almost surely, 2^51312703251 is an apocalyptic number.

51312703251 is a deficient number, since it is larger than the sum of its proper divisors (17122735293).

51312703251 is a wasteful number, since it uses less digits than its factorization.

51312703251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4625221.

The product of its (nonzero) digits is 6300, while the sum is 30.

The spelling of 51312703251 in words is "fifty-one billion, three hundred twelve million, seven hundred three thousand, two hundred fifty-one".