51004256361 has 8 divisors (see below), whose sum is σ = 68049080064. Its totient is φ = 33981135120.

The previous prime is 51004256353. The next prime is 51004256363. The reversal of 51004256361 is 16365240015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51004256361 - 2³ = 51004256353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51004256363) 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, 5420130 + ... + 5429531.

It is an arithmetic number, because the mean of its divisors is an integer number (8506135008).

Almost surely, 2^51004256361 is an apocalyptic number.

It is an amenable number.

51004256361 is a deficient number, since it is larger than the sum of its proper divisors (17044823703).

51004256361 is a wasteful number, since it uses less digits than its factorization.

51004256361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10851231.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 51004256361 its reverse (16365240015), we get a palindrome (67369496376).

The spelling of 51004256361 in words is "fifty-one billion, four million, two hundred fifty-six thousand, three hundred sixty-one".