51203940330 has 64 divisors (see below), whose sum is σ = 133144311168. Its totient is φ = 12552314880.

The previous prime is 51203940317. The next prime is 51203940331. The reversal of 51203940330 is 3304930215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51203940331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1145511 + ... + 1189370.

It is an arithmetic number, because the mean of its divisors is an integer number (2080379862).

Almost surely, 2^51203940330 is an apocalyptic number.

51203940330 is an abundant number, since it is smaller than the sum of its proper divisors (81940370838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51203940330 is a wasteful number, since it uses less digits than its factorization.

51203940330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334951.

The product of its (nonzero) digits is 9720, while the sum is 30.

The spelling of 51203940330 in words is "fifty-one billion, two hundred three million, nine hundred forty thousand, three hundred thirty".