51203430466 has 36 divisors (see below), whose sum is σ = 82185006834. Its totient is φ = 23843020800.

The previous prime is 51203430451. The next prime is 51203430503. The reversal of 51203430466 is 66403430215.

It can be written as a sum of positive squares in 3 ways, for example, as 42857694441 + 8345736025 = 207021^2 + 91355^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 199235010 + ... + 199235266.

Almost surely, 2^51203430466 is an apocalyptic number.

51203430466 is a deficient number, since it is larger than the sum of its proper divisors (30981576368).

51203430466 is an equidigital number, since it uses as much as digits as its factorization.

51203430466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Multiplying 51203430466 by its sum of digits (34), we get a square (1740916635844 = 1319438²).

51203430466 divided by its sum of digits (34) gives a square (1505983249 = 38807²).

The spelling of 51203430466 in words is "fifty-one billion, two hundred three million, four hundred thirty thousand, four hundred sixty-six".