51204439730 has 16 divisors (see below), whose sum is σ = 92257406784. Its totient is φ = 20461905840.

The previous prime is 51204439729. The next prime is 51204439733. The reversal of 51204439730 is 3793440215.

It is not an unprimeable number, because it can be changed into a prime (51204439733) 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, 2472932 + ... + 2493551.

It is an arithmetic number, because the mean of its divisors is an integer number (5766087924).

Almost surely, 2^51204439730 is an apocalyptic number.

51204439730 is a deficient number, since it is larger than the sum of its proper divisors (41052967054).

51204439730 is a wasteful number, since it uses less digits than its factorization.

51204439730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4967521.

The product of its (nonzero) digits is 90720, while the sum is 38.

Adding to 51204439730 its reverse (3793440215), we get a palindrome (54997879945).

The spelling of 51204439730 in words is "fifty-one billion, two hundred four million, four hundred thirty-nine thousand, seven hundred thirty".