51515001104 has 20 divisors (see below), whose sum is σ = 114068931264. Its totient is φ = 22077857568.

The previous prime is 51515001103. The next prime is 51515001119. The reversal of 51515001104 is 40110051515.

It is a self number, because there is not a number n which added to its sum of digits gives 51515001104.

It is not an unprimeable number, because it can be changed into a prime (51515001103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229977572 + ... + 229977795.

Almost surely, 2^51515001104 is an apocalyptic number.

It is an amenable number.

51515001104 is an abundant number, since it is smaller than the sum of its proper divisors (62553930160).

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

51515001104 is a wasteful number, since it uses less digits than its factorization.

51515001104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459955382 (or 459955376 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 23.

Adding to 51515001104 its reverse (40110051515), we get a palindrome (91625052619).

The spelling of 51515001104 in words is "fifty-one billion, five hundred fifteen million, one thousand, one hundred four".