51210030405 has 64 divisors (see below), whose sum is σ = 84688478208. Its totient is φ = 26409976320.

The previous prime is 51210030401. The next prime is 51210030409. The reversal of 51210030405 is 50403001215.

It is an interprime number because it is at equal distance from previous prime (51210030401) and next prime (51210030409).

It is not a de Polignac number, because 51210030405 - 2² = 51210030401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51210030401) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 39300984 + ... + 39302286.

It is an arithmetic number, because the mean of its divisors is an integer number (1323257472).

Almost surely, 2^51210030405 is an apocalyptic number.

It is an amenable number.

51210030405 is a deficient number, since it is larger than the sum of its proper divisors (33478447803).

51210030405 is a wasteful number, since it uses less digits than its factorization.

51210030405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986.

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 51210030405 in words is "fifty-one billion, two hundred ten million, thirty thousand, four hundred five".